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v4.0.5 with flat tail support

Minor build fix for LLVM. Updated readme to reflect current build env. Adjust build for MinGW with GCC 4.9.3, and a more recent Boost there too.

Version 4.0.4

Doc updates for v4.0.3.

Add minimal MinGW libs to the Windows distribution.

Proper packaging

Removed FCIBs and the ghetto dist dir.
Use CPack to package up a DMG on Mac.