use xterm-256color as TERM
Revert "new patched cousine for powerline font use more linespace"

This reverts commit 59cd4ec0315a240332888060e561f064a44a17e6.
mr register command will reformat .mrconfig
mr: use git_url for register
mr: use custom git update

pull from remote upstream if exist
mr: add git fork command

fork @github, setup upstream remote and mr checkout
mr: add empty push to .instpkg
mr: add powerline-theme
zsh: setting for jeremyFreeAgent's powerline for zsh
mr: fix git update error