Documentation typos and minor include cleanup (#635)

include/libtorrent/create_torrent.hpp

@@ -40,7 +40,6 @@ POSSIBILITY OF SUCH DAMAGE.
 #include "libtorrent/storage.hpp"
 #include "libtorrent/hasher.hpp"
 #include "libtorrent/utf8.hpp"
-#include "libtorrent/allocator.hpp"
 #include "libtorrent/file.hpp" // for combine_path etc.
 
 #include "libtorrent/aux_/disable_warnings_push.hpp"
@@ -49,7 +48,6 @@ POSSIBILITY OF SUCH DAMAGE.
 #include <string>
 #include <utility>
 
-#include <boost/scoped_ptr.hpp>
 #include <boost/config.hpp>
 
 #include "libtorrent/aux_/disable_warnings_pop.hpp"
@@ -68,7 +66,7 @@ POSSIBILITY OF SUCH DAMAGE.
 //    and set the piece hashes.
 // 4. The torrent is bencoded into a file or buffer.
 //
-// If there are a lot of files and or deep directoy hierarchies to
+// If there are a lot of files and or deep directory hierarchies to
 // traverse, step one can be time consuming.
 // 
 // Typically step 3 is by far the most time consuming step, since it
@@ -156,7 +154,7 @@ namespace libtorrent
 		// piece_size will be calculated such that the torrent file is roughly 40 kB.
 		// 
 		// If a ``pad_size_limit`` is specified (other than -1), any file larger than
-		// the specified number of bytes will be preceeded by a pad file to align it
+		// the specified number of bytes will be preceded by a pad file to align it
 		// with the start of a piece. The pad_file_limit is ignored unless the
 		// ``optimize_alignment`` flag is passed. Typically it doesn't make sense
 		// to set this any lower than 4kiB.
@@ -267,7 +265,7 @@ namespace libtorrent
 
 		// Sets and queries the private flag of the torrent.
 		// Torrents with the private flag set ask clients to not use any other
-		// sources than the tracker for peers, and to not advertize itself publicly,
+		// sources than the tracker for peers, and to not advertise itself publicly,
 		// apart from the tracker.
 		void set_priv(bool p) { m_private = p; }
 		bool priv() const { return m_private; }
@@ -382,17 +380,17 @@ namespace libtorrent
 	}
 
 	// Adds the file specified by ``path`` to the file_storage object. In case ``path``
-	// refers to a diretory, files will be added recursively from the directory.
+	// refers to a directory, files will be added recursively from the directory.
 	// 
 	// If specified, the predicate ``p`` is called once for every file and directory that
-	// is encountered. files for which ``p`` returns true are added, and directories for
+	// is encountered. Files for which ``p`` returns true are added, and directories for
 	// which ``p`` returns true are traversed. ``p`` must have the following signature::
 	// 
 	// 	bool Pred(std::string const& p);
 	// 
 	// The path that is passed in to the predicate is the full path of the file or
 	// directory. If no predicate is specified, all files are added, and all directories
-	// are traveresed.
+	// are traversed.
 	// 
 	// The ".." directory is never traversed.
 	// 

include/libtorrent/extensions.hpp

@@ -63,7 +63,7 @@ POSSIBILITY OF SUCH DAMAGE.
 // mutex locked. And they are always called from the libtorrent network thread. In
 // case portions of your plugin are called from other threads, typically the main
 // thread, you cannot use any of the member functions on the internal structures
-// in libtorrent, since those require the mutex to be locked. Futhermore, you would
+// in libtorrent, since those require the mutex to be locked. Furthermore, you would
 // also need to have a mutex on your own shared data within the plugin, to make
 // sure it is not accessed at the same time from the libtorrent thread (through a
 // callback). See `boost thread's mutex`_. If you need to send out a message from
@@ -71,7 +71,7 @@ POSSIBILITY OF SUCH DAMAGE.
 // sending in ``tick()``.
 // 
 // Since the plugin interface gives you easy access to internal structures, it
-// is not supported as a stable API. Plugins should be considered spcific to a
+// is not supported as a stable API. Plugins should be considered specific to a
 // specific version of libtorrent. Although, in practice the internals mostly
 // don't change that dramatically.
 // 
@@ -150,7 +150,7 @@ POSSIBILITY OF SUCH DAMAGE.
 // of simply allocating a new instance as a copy of ``*this`` is all that's
 // expected.
 // 
-// The static category is required for checking wether or not the category
+// The static category is required for checking whether or not the category
 // for a specific alert is enabled or not, without instantiating the alert.
 // The ``category`` virtual function is the run-time equivalence.
 // 

include/libtorrent/file_storage.hpp

@@ -253,7 +253,7 @@ namespace libtorrent
 			// this file has the executable attribute set.
 			attribute_executable = 4,
 
-			// this file is a symbilic link. It should have a link
+			// this file is a symbolic link. It should have a link
 			// target string associated with it.
 			attribute_symlink = 8
 		};
@@ -269,7 +269,7 @@ namespace libtorrent
 		// being added. This memory is *borrowed*, i.e. it is the caller's
 		// responsibility to make sure it stays valid throughout the lifetime
 		// of this file_storage object or any copy of it. The same thing applies
-		// to ``filehash``, wich is an optional pointer to a 20 byte binary
+		// to ``filehash``, which is an optional pointer to a 20 byte binary
 		// SHA-1 hash of the file.
 		// 
 		// if ``filename`` is NULL, the filename from ``path`` is used and not