Issue #99: return 3 when service not running

Move towards LSB init spec. Allows opscode chef to manage the neo4j
service.
fix compliance for non-default logback implemenatations

There are use cases when Neo4j is used embedded and the environment provides a custom implementation of SLF4j's StaticLoggerBinder (e.g. https://github.com/grails/grails-core/blob/061f020de1b8563c2ac7aaed421f079d10208237/grails-plugin-log4j/src/main/groovy/org/slf4j/impl/StaticLoggerBinder.java)

These custom implementation might not return a LoggerContext when getSingleton().getLoggerFactory() is called, since it's only guaranteed to retrieve a ILoggerFactory. Neo4j needs to deal with this situation gracefully.

Therefore InternalAbstractGraphDatabase should catch any exceptions upon logging initialization and fall back to ClassicLoggingService if necessary.

Testing this is a PITA, since static methods need to be mocked. PowerMock to the rescue!
Merge pull request #847 from sarmbruster/fix_logback

fix compliance for non-default logback implemenatations
Initial PEG parser for Cypher
Check context of aggregating functions
Check for UNION mixed with UNION ALL
Rename Expression Predicate context to Simple context
Renamed package peg->experimental
Updated dependencies to non-private APIs

These classes used private APIs in junit or Sun's old reflection packages. They've been updated to depend on the new APIs now.
Updated gitignore
First parser unit test converted
Change enum case classes to objects
Fix IdentifierCharacter naming and make context lazy
Merge pull request #820 from shanegibbs/master

Small step towards LSB spec for linux services
Welcome @sgibbs-kellermed as a neo4j contributor!
Fix reference to osx-docbook-register in manual/README

Fixed a typo in the readme of the manual,
where osx-register-docbook was referenced,
whereas the filename is actually osx-docbook-register.
Remove mention of python-embedded from the README

This no longer applies since we moved python-embedded out as a
seperate project.
Remove Neo Technology-specific tooling

I don't believe that this is used any more. Even if it is, it
doesn't belong in this repo.
Merge pull request #860 from VolkerL/manual-readme

Fix reference to osx-docbook-register in manual/README
Remove unused attributes/methods