Fix deletion of variates

Reviewer: Daniel Villafuerte (post-commit)

Issue: GCP-9667
add hasPair info to the standard variable summary
Reviewer: Dan Villafuerte (post-commit)
Fix delete of data in observations

Reviewer: Dan Jao (post-commit)

Issue: None
fix hasPair constraints
Reviewer: Dan Villafuerte (post-commit)
Merge branch 'master-dev-august2014'

Conflicts:
	src/main/java/org/generationcp/middleware/operation/saver/WorkbookSaver.java