removed server requirement. fixed folder issue for error tracking
latexmk fix
doc
separate message when no files were changed
fixed unasked for foldmethod changing
optional async compiling
added mappings
grouped async functions
reimplemented continuous mode compiling
quickfix window error refresh bug fix
continuous mode for vim server compiling
fix
added documentation
doc changes
Merge pull request #97 from mtth/noserver

Merge noserver into LaTeX-Box master
This is a big update!

This update brings two new options:
* g:LatexBox_latexmk_async (default: 0)
  If 1, use vimserver to allow asynchronuous compilation.
  The asynchronuous mode is not available on Windows.
  
  Note also that this changes the default behaviour of
  LaTeX-Box in that the async mode is not activated as
  default. The reason is to let portability be the priority.
  The default settings should work on all systems.
* g:LatexBox_latexmk_preview_continuously (default: 0)
  If 1, add '-pvc' flag to latexmk to let latexmk compile
  the document continuously whenever the document is
  updated (saved).