Changes for release v0.5.1

Rebranding part 1: title and image (vim-devicons) (enhancement #76)

Forgot some contributor mentions and changes in changelog for v0.4.4

Updated vim doc with latest readme updates (html2vimdoc)

Updated vim doc with latest readme updates (html2vimdoc)

Version bump to v0.4.1

#27 Remove [ ] wrapping icons

v0.3.4 more updates: more sample usage images

version v0.3.3 bumped and updated changelog and readme

removed screenshots from repo: offloaded screenshot references from r…

…epo to the wiki