changed comments
added KeyModifier class and JUnit tests in KeyModifierTest
Merge pull request #15 from darylseah/master

Unit tests for storage framework.
changed method name from getNumKeyVersions() to getKeyVersionsCount() as Cory suggested
Merge remote-tracking branch 'upstream/master'
Merge pull request #14 from jmaheswaran/master

Added KeyModifier, KeyModifierTest, KeyModifierException classes, updated Key and SymmetricEncryptionTest classes
moved exceptions to new package
Merge pull request #16 from jmaheswaran/master

moved exceptions to new package
moved keyversion
Merge pull request #17 from jmaheswaran/master

moved keyversion
moved files
Merge pull request #18 from jmaheswaran/master

moved files