added functionality in Dash to search Vagrant
Added search functionality for Vagrant, Bash and VIM

Paralleled previous functionality but with searches for Vagrant, Bash
and VIM. Provided transparent icons for each. Added iconography to each
folder. Updated versioning in json files to v1.22 and updated readme
with calls.
Merge pull request #29 from mjbrender/add-vagrant-bash-vim

added functionality in Dash to search VIM, Bash and Vagrant