Finished chapter 9 of Learn Vimscript the Hard Way

- added wrapping visually-selected text with double and single quotes.
- mapped H and L keys to move to the first nonwhitespace char. and end
  of line
- added operator-pending mappings for H and L so they can be used for
copying/deleting, etc.
- moved relative/absolute numbering to their own group.
- created JS snippets for function, while, and for blocks.
- extracted Jasmine and Rspec blocks.
added inside/around next/previous parenthesis/curly braces mappings
expanded the regex for operator-pending mappings for headers to detect dashes