New redirect checker for arduino: avrgcc.
Manual: add a note about YouCompleteMe.
SyntasticInfo: more details about modes.  Minor cleanup.
SyntasticInfo: minor bug fix.
Check for +float.
Typo.
Refresh optimisations: avoid floats.

The price for this is the assumption reltime() returns a list of
integers [high, low].
JSHint checker: sort results.
Defensive coding against stepping over other plugins' signs.
Security: disable the elixir checker by default.

This executes the code your files. This is probably fine if you wrote
the files yourself, but it can be a problem if you're trying to check
third party files. If you are 100% willing to let Vim run the code in
your files, set g:syntastic_enable_elixir_checker to 1 in your vimrc.

References:

https://groups.google.com/d/msg/elixir-lang-talk/B29noPHvQ-8/9JvSGPop7n0J
Manual: add a note about canceling default arguments.
Revert 1e3e0a8.  The problem was placing signs on unloaded buffers.