Set up current branch while getting the status - refs #16
Moved the initial branch retrievial in the prepareRepo function - refs #16
Refactor: extract method - refs #16
Merge branch 'master' into compute-local-branch

Conflicts:
	lib/git.js
Removed previously extracted function not necessary anymore
NFE to AFE
Merge pull request #16 from chadrien/compute-local-branch

Figure out branch-name (default: 'master') when Git repo object is initialized.