Adding highlighting of gfm code blocks
Merge pull request #72 from ivotron/master

Adding highlighting of GFM code blocks
improving the documentation of pandoc executors
require non-whitespace before closing '$'. Should fix #69.

The Pandoc User Guide states:

> Anything between two $ characters will be treated as TeX math. The
> opening $ must have a character immediately to its right, while the
> closing $ must have a character immediately to its left. Thus, $20,000
> and $30,000 won’t parse as math.

Fixed the syntax matching regex to require a non-whitespace before
the closing '$'.
Keeps SuperTab from completing at start of line

This is accomplished adding '^' to b:SuperTabNoCompleteAfter.
Makes "=" pay attention to document `textwidth`

Previously pandoc would always format to 72-character columns. This will
pull from `textwidth`, assuming it is declared. If it isn't, we'll just
fall back to pandoc's default (72-character columns).
removing remappings of "j", "k", etc for soft wrap mode. Closes Issue 77
Merge pull request #79 from PiPeep/pull-request-02

Makes "=" pay attention to document `textwidth`
Merge pull request #75 from PiPeep/pull-request-01

SuperTab tries to complete on a newline
updating README
Highlight LaTeX blocks delimited by $ on line alone
Revert "Highlight LaTeX blocks delimited by $ on line alone"

Remove multiline tex highlighting with $ blocks. Although it looks nice,
it isn't recognized by pandoc rendering so literal $ are typeset.

This reverts commit 42fc3987175340ecf41c077bb33517bb12141db4.
Toggle pandoc/tex syntax highlighting w/ local mapping

Toggle between pandoc & tex syntax highlight by <localleader>s

Mixed syntax highlighting is painful, and imperfect at best, so a
workaround is to simply switch syntax highlighting modes manually when
editing large blocks of tex or pandoc