Remove never-implemented flag --indy. Fixes #2231.
Clean up block cloning for instance_eval and friends.

Conflicts:
	core/src/main/java/org/jruby/RubyBasicObject.java
	core/src/main/java/org/jruby/RubySymbol.java
Fully clone block + frame for instance_eval forms.

Fixes #1768 and #2060.
Merge remote-tracking branch 'origin/jruby-1_7'

Conflicts:
	core/src/main/java/org/jruby/RubyBasicObject.java
	core/src/main/java/org/jruby/RubySymbol.java
	core/src/main/java/org/jruby/runtime/Block.java
	core/src/main/java/org/jruby/runtime/BlockBody.java
	core/src/main/java/org/jruby/runtime/CompiledSharedScopeBlock.java
	core/src/main/java/org/jruby/runtime/SharedScopeBlock.java
Merge remote-tracking branch 'origin/master'