count default gems as installed

fixes #2780
handle default gems in ruby 1.9
Fix Rubygems integration with 1.8.0-1.8.19

Conflicts:
	lib/bundler/rubygems_integration.rb
Revert "Set --no-cache when bundle install --local is called."

This reverts commit 39e254576ce6b3a692ce993407f1cefbd7fd17a2.

Conflicts:
	CHANGELOG.md
Version 1.3.6 with changelog