Kim Plowright's contrib

Squashing Kim's commits to make one big atomic commit for saner history
(some commits exist in the past for Zenburn HEAD).

Signed-off-by: Jani Nurminen <slinky@iki.fi>
Better transparent terminal support

Sets the background color in cterm and gui to 0 and #000000 when
g:zenburn_transparent is 1.

Signed-off-by: Jani Nurminen <slinky@iki.fi>
Sync with Kim Plowright's contrib repository

Contains:
  02b59e470e08bd642af05239afba368206fd1c3a adding alfred app theme
  699e1d7246c9fe1139f4b0f718c184ca0ae4631b Adding ports for mou and omnifocus

Signed-off-by: Jani Nurminen <slinky@iki.fi>
fixes, making scheme more consistent

* swap IncSearch gui fg/bg to match original scheme
* remove some bg color settings (or change to NONE) so they don't have
  to be fixed later
* fix terminal IncSearch to match gui more closely
* introduce terminal MatchParen
* use dark green instead of grey for terminal Search bg
* terminal Todo should be a very light grey, not green
* Underlined should be underlined
* Use color 231 (#ffffff) for WarningMsg instead of the user's color15
  which is more likely to be themed by the terminal
* WildMenu should be underlined
* s/gui/cterm/ for terminal Error settings, and match the gui theme
  better
added first version of real transparent backgrounds, does not look good in all cases yet
Merge branch 'holomorph-fixes'
Merge branch 'contribs'