Minor changes to 2.x, added 3.1+3.2 and skeleton for 3.3.
Merge branch 'master' of https://github.com/origooo/Term4-C_collaboration
Merge branch 'master' of https://github.com/origooo/Term4-C_collaboration
Merge branch 'master' of https://github.com/origooo/Term4-C_collaboration
Added 3.x