Removed bottle
Corrected file name in RELEASE
Exclude build package from installation
Added build command override
Implemented build steps as build commands
Do not fail setup if build package is unavailable
Moved build information retrieval into setup.py
Do not fail setup if README or CHANGES is unavailable
Set file extension of README to render correctly on github
Set file extension of CHANGES
Set file extension of RELEASE
Merge branch 'fixup-build'
Release 0.5