The output of flake8 is ambiguous as to whether results should be
interpreted as warnings or errors. I have changed it to assume errors to
match the python/pyflakes checker.
In future we may want to change this or add items to the errorformat for
some specific warnings if they are annoying.
This fixes#203.
* remove the public SyntasticHighlightErrors() function
* shift the above code into s:HighlightErrors(). This is called
automatically if g:syntastic_enable_highlighting is set
* to get the highlight regex we just look for a function called
Syntastic_<filetype>_GetHighlightRegex
* to force this function to be called, each error item must have the
'force_highlight_callback' key set
This code has one important functional change: now errors are *always*
highlighted if possible whereas previously they were only highlighted if
a call to SyntasticHighlightErrors was made.
