Allow relative paths in executable()
Add has() builtin function

Checks whether particular property is enabled.  Two properties for
now:
 - "unix"
 - "win"

Thanks to filterfalse.
Add logical NOT unary operator ("!")
Use "!" operator for has() example in docs
Remove just added SL_PREFIX from docs

It's not defined.
Separate Vifm's vimdoc from plugin documentation
Add file renaming filetype plugin for Vim

It displays list of original file names in a vertical split.

Thanks to Factorial Prime.
Make vifm_home global in vifm.vim
Add file additional mail filetype plugin for Vim

It allows one to pick attachments via Vifm on <leader>A shortcut.
Thanks to Pavneet Arora.