alt_treb_chordTool developed. Implemented in A_Maj and A_flat_Maj.
E_Maj and E_flat_Maj alternates implemented.
alt_treb_ChordTool implemented in all necessary Major Key signatures. It is currently appropriate to merge this branch back to master. alt_bass_chordTool can be written in master. Incrementing version number in tags to v0.1.5 after merge.