[docs] Improve Git workflow documentation (#219)
[docs] Improve Git workflow documentation (#219)

* [docs] Improve Git workflow documentation

Fixes #80.

* Address Yida's comments

TuKo/brainiak,mihaic/brainiak,IntelPNI/brainiak,brainiak/brainiak,CameronTEllis/brainiak,TuKo/brainiak,brainiak/brainiak,yidawang/brainiak,mihaic/brainiak,yidawang/brainiak,lcnature/brainiak,lcnature/brainiak,IntelPNI/brainiak,lcnature/brainiak,IntelPNI/brainiak,TuKo/brainiak,mihaic/brainiak,yidawang/brainiak,brainiak/brainiak,CameronTEllis/brainiak,CameronTEllis/brainiak