Adds IncPairRule
Merge pull request #7 from Qatar-Computing-Research-Institute/er

Merge ER into the master.
- Disable running in X64 mode.
- Improve the memory performance by using string serialization strategy.
Update README.md
Update README.md
- Adds test cases for incremental inserting.
Adds similarity library
Adds qatar living vehicles dataset.
Merge remote-tracking branch 'origin/er' into er

Conflicts:
	ruleext/src/qa/qcri/nadeef/ruleext/template/ERRuleBuilder.stg
	test/src/qa/qcri/nadeef/test/core/ERDetectionTest.java
	tools/src/qa/qcri/nadeef/tools/Metrics.java