Catch all Pygments errors

An unrecognized language was generating a MentosError rather than a
PythonError. Just catch anything that goes wrong in Pygments.
Fix lack of CoffeeScript livepreview

Pygments calls it coffeescript, but Ace calls it coffee.
Merge pull request #533 from wrs/wrs_syntaxfixes

Two little syntax highlighting fixes
Add bump task to Rakefile
Add rake bump to readme
Release 2.2.3
Use rake release in readme
Fix pygments language to Ace mode translation
Ensure declaredLanguage is lower case
Update README.md
https://github.com/travis-ci/travis-ci/issues/725

Modified README to trigger a Travis CI build. It's currently broken.
Try to fix Travis

FFI is no longer used in the new pygments.rb.
apt-get update may resolve the asciidoc install failure.
Bash is Ace mode sh
Update language comment
Fix #542

Page link may contain duplicate starting forward slashes.
//page points to http://page/ when what we want is
/page pointing to http://localhost:1234/page
Revert "Fix #542"

This reverts commit 2f3dd3d227862da1af6c85d6018facf1ff8b8a2d.
Add test for #542
Fix #542
Update comment
Fix spacing