use snapshot jruby-openssl gem
fix build to use snapshot gems from oss.sonatype.org
fix some info about releasing, testing, etc
[skip ci]
Merge branch 'jruby-1_7'

Conflicts:
	BUILDING.md
	lib/pom.rb
	lib/pom.xml
[Truffle] Have a try at fixing Module.nesting.
[Truffle] Fix main.include to delegate to Module#include.
[Truffle] Have a try at implementing Module#ancestors.
[Truffle] Refactor debugModuleChain().
[Truffle] Re-use Module#Include implementation for main.include.
Consolidate fixes for #305