Updated email-address
Using ± indicating a git repository
Added alias preview displaying diff between index and local history (commited stuff).
Added alias review displaying changes of last commit.
Documented aliases preview & review
Refactored git-repo-check into own method.
Added function to set a prompt-terminator for git-dirs and normal-dirs.
Prefixed branch-names with @-sign
Merge branch 'cleaner-prompt' into work-home
Fixed parameter of alias review