Add deprecation warning
Add support for command windows (q:, q/)

Previously it worked for q: only due to the FileType event.

Fixes #196.
Setup statusline for all windows opened when vim starts

Fixes #187.

Note: netrw is known to spoil things.
Use stricter matches. Also don’t count on 'ignorecase' option when matching buffers

Fixes #182.

Note: don’t know what to do with LustyExplorer and vimpager: unable to
get buffers with such name or filetype.
Merge remote-tracking branch 'upstream/develop' into develop

* upstream/develop:
  Use stricter matches. Also don’t count on 'ignorecase' option when matching buffers
  Setup statusline for all windows opened when vim starts
  Add support for command windows (q:, q/)
  Add deprecation warning