Merge pull request #15 from houzy/upstream

Change vim-multiple-cursors plugin from terryma/vim-multiple-cursors to kristijanhusak/vim-multiple-cursors
solve conflicts according to https://github.com/kristijanhusak/vim-multiple-cursors#info
Update vimrc
add YCM
add augroup indent_guides
Merge remote-tracking branch 'upstream/master' into upstream