Issue #1350346 by patcon, floretan: Fixed Fatal error when exporting variables with colons in their names.

Issue #1286396 by das-peter, jweowu: Notice: Undefined property: stdClass:: in variable_features_export()

Issue #1233642 by Simon Georges: Added Follow-up of #1117882: Update hook_features_pipe_alter() with D7 variables.

Issue #1094598 by catch, msonnabaum, stijndm, das-peter, Pisco: Performance issues from strongarm_init()

this is a merge from this github commit :
http://github.com/Vertice/strongarm/commit/587e86600e1bc844038941dd5f4b13c10cb8466f

create branch 'DRUPAL-7--2'.

Sprout from DRUPAL-6--2 2010-02-06 01:17:08 UTC young hahn <yhahn@264833.no-reply.drupal.org> 'Removing custom variable export function (committed to CTools and included in 1.3) and changing CTools export API owner to 'strongarm'.'
Cherrypick from master 2009-05-06 17:55:05 UTC Jeff Miccolis <jeff@miccolis.net> 'Initial commit of strongarm module, which lets modules enforce variable settings.':
    strongarm.css

Removing custom variable export function (committed to CTools and included in 1.3) and changing CTools export API owner to 'strongarm'.

Ensure schema cache is not stale and actually init. Allows strongarm to be used during install tasks of install profile.

Removing the strongarm drush command. Drush now supports the 'vget' command which serves a similar purpose. Additionally the drush command is no longer needed for exporting.