Merge pull request #4 from vortura/master

Use processing-java to run sketches from Vim.
Made some cleaning and clarifications, namely on how to set 'use_processing_java'
Merge pull request #5 from vitorgalvao/clarifications-to-the-README

Made some cleaning and clarifications, namely on how to set 'use_process...
Improved ftplugin.
Improved syntax.
Thanks for @mattn .
Merge pull request #10 from crazymaster/syntax

Improved syntax.
Added processing_fold.
Merge pull request #8 from crazymaster/master

Improved ftplugin.
Fixed typo.
Merge pull request #12 from crazymaster/master

Fixed typo.