lhasa LHA decompression library from https://github.com/fragglet/lhasa tag
v0.3.1 (commit c6d6ca6df218a54c94443f8d15afe2869461506f).
The following changes have been made:
 *  commit
    https://github.com/fragglet/lhasa/commit/59c43fc841bfdba970a810e21d97f5e074cd286e
    has been applied.
 *  Obviously, unnecessary folders and files have been removed.
 *  The test directory is not included in the OpenMPT repository.
For building, premake is used to generate Visual Studio project files.
See ../build/premake/ for details.
