Added more project information.

README

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 =============
 *** TTT3D ***
 =============
-TTT3D is a 3D tic-tac-toe game for class.
+TTT3D is a 3D tic-tac-toe game for class. This project was implemented
+in OpenGL 3.3, and uses several different libraries which were used to
+simplify the development.
+
+# How to Play
+-------------
+The objective of the game is to place three pieces of a kind in a row of
+three. When entering the game there will be a piece hovering over the
+board in green. This is the temporary piece you place on the board in
+order to choose which square to put it in. You can control this piece
+with the following inputs:
+
+  - Arrow Keys: move the piece across the board.
+  - Spacebar: Place the piece below.
+
+If the piece is red, this means that another piece is currently below,
+and you cannot place another piece there.
+
+# Building
+----------
+## Requirements
+The following requirements are necessary to build this project:
+ - C++14 compatible compiler (GCC is recommended)
+ - CMake 2.8 or greater
+ - OpenGL 3.3 or greater
+ - GLEW
+ - GLUT
+ - GLM
+ - AssImp (used for model importing)
+ - SDL2 (used for window and input management)
+
+## Compiling
+To compile run the following commands from the root directory of the
+project:
+
+  cd build/
+  cmake ..
+  make
+
+By default this will create a release build of the program with compiler
+optimizations. To compile with debug flags, append the flag
+`-DCMAKE_BUILD_TYPE=debug' to the `cmake' command above.
+
+# License
+---------
+The contents of the directory `assets/models/' belong to the public
+domain. All other files of this project are licensed with the GNU Affero
+General Publice License (see `LICENSE' file).