[.vim/vimrc] move rst title function into ftplugin/rst.vim, refine vimrc
[.vim/vimrc] rewrite Title() function, it's smarter now
[.vim] add syntax/rst.vim
[.vim] refine syntax/rst.vim, add enumerated list coloring
[.vim][rst.vim] add feature: press t{n} on title line also works
[.vim][rst.vim] Refine rst list, lookahead white spaces
Merge branch 'rst'