Consistency checker: LabelScanStore->NodeStore: Verify referenced node exists
Consistency checker: LabelScanStore->NodeStore: Verify labels on nodes
Adds documentation for MATCH with properties in it
Fixes bug in predicate rewriter

When moving properties from MATCH to WHERE, the PredicateRewriter would
get into a never ending loops, adding predicates and never removing them from
MATCH.
Merge pull request #1391 from apcj/2.0-ccheck-label-scan-store

2.0 ccheck label scan store