Add the beginnings of a README file

README.md

@@ -0,0 +1,48 @@
+# Aegisub
+
+For binaries and general information [see the homepage](http://www.aegisub.org).
+
+The bug tracker can be found at http://devel.aegisub.org.
+
+Support is available on [the forums](http://forum.aegisub.org) or [on IRC](irc://irc.rizon.net/aegisub).
+
+## Building Aegisub
+
+### Windows
+
+Prerequisites:
+
+1. Visual Studio 2012. Express edition might work.
+2. A recent Windows SDK
+3. A recent DirectX SDK
+4. A MSYS install with git and c99conv. Note that mingw is not required.
+
+There are a few optional dependencies:
+
+1. msgfmt, to build the translations
+2. WinRAR, to build the portable installer
+3. InnoSetup, to build the regular installer
+
+All other dependencies are either stored in the repository or are included as submodules.
+
+Building:
+
+1. Clone Aegisub's repository recursively to fetch it and all submodules: `git clone --recursive git@github.com:Aegisub/Aegisub.git`
+2. Disable autocrlf for ffmpeg, as its build system manages to not support Windows newlines: `cd aegisub/deps/ffmpeg && config --local core.autocrlf && git rm --cached -r . && git reset --hard`
+3. Open Aegisub.sln
+4. Build the "! Update Dependencies" project
+5. Open the properties for the Aegisub project and set the location of MSYS in Configuration Properties > Aegisub > Library paths
+6. Build Aegisub
+7. Copy the contents of an existing Aegisub install into the aegisub/aegisub/bin directory (not strictly required, but you'll be missing a lot of functionality otherwise).
+
+There's a pile of other files such as dictionaries, VSFilter and avisynth 
+
+For actual development work you will probably want to mostly use the
+"Debug-MinDep" configuration (which disables building most of the projects), as
+the dependency checking is pretty slow.
+
+## License
+
+All source files in this repository are licensed under either 3-clause BSD or
+ISC licenses. In practice, Aegisub binaries are usually GPL licensed due to the
+dependencies.

aegisub/README

@@ -1 +0,0 @@
-* To be written.