Haskell cleanup.

Make the "compressWhitespace" filter kill \001 characters.
Make the ghc-mod checker use the "compressWhitespace" filter.
Minor formatting of the hlint checker.
Leftover from 7eda5de.  How embarrasing.
Reuse loclists when possible, to allow :lolder and :lnewer.

This is not completely safe: if a loclist is created by something
other than syntastic before the error window is displayed, syntastic
will obliterate it.  There is currently no way to tell if a
loclist was created by syntastic or not.  Undocumented variable
g:syntastic_reuse_loc_lists can be used to disable reuse of loclists.
Bug fix: allow loclist cleanup.
Coffeelint: Fixed errorformat, last line is optional
Merge pull request #765 from AsaAyers/master

Coffeelint: Fixed errorformat, last line is optional
Merge branch 'loclist_count'
Update errorformat for typescript/tsc.
[issue-767] Remove backslash in puppet-lint log format (refs: #767)
Merge pull request #768 from sbadia/issue-767

Remove backslash in puppet-lint log format (fixes #767)
Minor bug fix: setting checker names in CacheErrors().
Add pep257 Python syntax_checker
Fix setting title of the error window.

Sadly this is slow.
More fiddling with typescript/tsc errorformat and args.
Yet more typescript/tsc errorformat contortions.
Merge remote-tracking branch 'marc2982/master'
Bug fix: split checker output into lines before preprocessing.
Cleanup the python/pep257 checker.
Cleanup errorformat for tex/chktex.
Cleanup errorformat for tex/lacheck.