Remove git aliases.
Merge branch 'master' of https://github.com/sudarkoff/dotfiles

* 'master' of https://github.com/sudarkoff/dotfiles:
  Add xml and json to *find family of aliases. Reimplement a few things to streamline the usage: renamed _find_regex to findgrep; allow to pass a wildcard instead of a language to findgrep. E.g.: findgrep *.md word.
  Add slate config file.
Merge with upstreame