Changeset b949a0f in lab.git for Commentary

• add .gitconfig to set default for git
  • refer: ​http://blog.asial.co.jp/845
• remove default settings from .bashrc they already exist in the original .bashrc
• fix LESS variable
  • git log command uses escape sequences
  • original LESS variable of less which was forked by git log is LESS=FRSX
• add git_ps1 to shell prompt
  • original PS1 is '${debian_chroot:+($debian_chroot)}\u@\h:\w\$'
  • refer: ​http://d.hatena.ne.jp/deeeki/20110402/git_branch_ps1

git-svn-id: ​https://lab.mitty.jp/svn/lab/trunk@156 7d2118f6-f56c-43e7-95a2-4bb3031d96e7