* Added notermguicolor support and special effects
* Added notermgui support
* Exposed special parameters for highlight(like bold,italic) to themes
with gui like to bold "B" in normal mode do normal.b.gui = 'bold'
* Changed CONTRIBUTING.md to reflect current notermguicolor support
* Added calculating cterm values from rgb
* refactored highlight function
* Removed 'bold' default for a element
* Updated themes
* Adding function genarated cterm values to themes
* Updating CONTRIBUTING.md
* made colorschemes more compact
Co-authored-by: hoob3rt <pelczarskihubert@gmail.com>
shadmansaleh
Hubert Pelczarski
Joshua Chapman
hoob3rt