Cleanup of vimrc, First commit of ColorTune plugin

* Cleanup of .vimrc, also added some todos and notes.
* Initial commit of my 'ColorTune' plugin. (easier color management)
Minor fixes in .vimrc

* fixed typos.
* removed trailing whitespaces.
* improved comments.
New GUI colortheme: 'olgas'
Add Palette Viewer for cterm colors for ColorTune
Initial commit of the 'potion' plugin

Initial commit of my very first Vim plugin It was coded along this
tutorial: http://learnvimscriptthehardway.stevelosh.com
Minor fixes and improvements of potion.txt
Set highlight of WarninMsg in 'olgas' colorscheme
Add mapping for running ':make' to .vimrc file