[sbt] fix config install
[vim] upgrade scala bundle
[vim] configure quickfixsigns
[vim] add vimbuddy
Revert "[vim] add vimbuddy"

This reverts commit 8d1e9bcae0b9e6cfe1b1a1062fe806e4ab16c41e.
[vim] improve airline
ignore sbt files
don't run weechat locally anymore
[vim] upgrade scala bundle
[vim] enable scala sbt quickfix from templates
[vim] random tweaks