Update BufExplorer to version 7.4.4.
Patch BufExplorer to eliminate select-mode mappings.
Unmap some stray undesirable select-mode mappings.
Disable UltiSnips's feature for removing select-mode mappings.
Fix typo in CHANGES.txt.
Document patched version of BufExplorer.
Break undo for some insert-mode deletion operations.
szakdark: color escape bytes slightly darker than the string
szakdark: Add style for emphasis and strong emphasis in reStructuredText
Setup configuration point for disabling pathogen plugins.
Add the signature plugin.
Experiment with signature plugin.
Enable colorcolumn.
Try muted gray for colorcolumn.
Update ColorColumn overrides.
Automatically populate the location list with errors from Syntastic.

This helps ensure that the correct contents are there when using the
shortcut to pop open the location list.
Add better syntax checking for Sphinx-based reStructuredText documents.
Enable active checking for reStructuredText documents.

Now that we have better checking for Sphinx-based documents, there's no
reason to avoid checking reStructuredText documents.
Allow warnings for the rst2pseudoxml checker.
Adjust :L, :L2, etc., for 82 columns (leaving room for signs).