JBIDE-15772 remove feature from update site; instead, add plugins directly, as well as their sources; fix installation by providing associateSites for JBT, JBT Core Tests, and Red Deer
fix all manifest.mf files to list correct provider and set bundleshape: jar, bundlelocalization: plugin (JBIDE-16018)
JBIDE-15772 Removed the feature - no longer used

Since Nick changed the update site to use bundles directly,
the whole features/ folder became orphaned. No need to have dead
code in the repo so removing it entirely.
Increased default WaitForNonIgnoredJobs timeout.
Increased forge-distribution runtime version.
Method for removing forge runtime implemented.

Forge runtime preferences test fixed.
Fix & improvements of Forge CommandTests.
Add screencast folder to gitignore.
Fix Forge InstallPlugin tests.
Fix Forge Wizard tests.