Merged options.vim to auto_colo.vim

* set out implement a object oriented integrated s:Toy.
Focus on one file, remove other dead file to trash dir.
Added .gitignore to ignore *.swp files.
Half methods implemented rawly tested.
Begin to implement the essential self.shuffleColor() method ...
Begin to fill the final randomization logic.
Vim Color part almost finished.
Most part of vim part implemented, some bugs remained.
No need to autoload 'color_toy', merge into 'plugin/color_toy.vim'.
Bug fixed: nested autocommd in VimEnter & mapping changed.
Removed boring 'l:'s & added number pattern check logic in s:Toy.loadStat.
Bug fixed, saved incremented point in current context.
New method s:Toy.resetStat() added.
Added command :ColorToyReset.
Color can be showed after vim startup again.
Minor code clean.
Add onColorScheme echoing logic.