Revert "Fix typo"

This reverts commit 12c2305329753576126cfe6f341d91f75f4e251e.
Revert "Wrapped prompt colors in \[ and \] to fix history."
Fixes #48 for now

This reverts commit 6acf7f8d3ec689f1f38c19a54a73b46f13ad1db6.
Fixed git status is broken on branch name containing forward-slash.
Merge pull request #50 from garryyao/fix/git-status

Fixed git status is broken on branch name containing forward-slash.
Made gitstatus variables for `symbols_ahead`, `symbols_behind` and `symbols_prehash` configurable via `git-prompt-colors.sh`
Fixes #51

The new variables are:

```bash
GIT_STATUS_SYMBOLS_AHEAD
GIT_STATUS_SYMBOLS_BEHIND
GIT_STATUS_SYMBOLS_PREHASH
```
Added different behavior for root prompt in git_prompt_config()
Made the start and end of the prompt configurable via the .git-prompt-colors.sh
updated README
Update gitprompt.sh

Remove trailing whitespaces
Merge pull request #54 from ChoiZ/patch-1

Update gitprompt.sh
Merge remote-tracking branch 'magic/master' into perso2

Conflicts:
	git-prompt-colors.sh
	gitprompt.sh