Added javadoc to dateUtil
Added isBlank method for DateUtil.
added isBlank method to DateUtil class.
Merge pull request #2 from FairyTail/feature-basic

Updates for DateUtil
Fix conflict
added isNotBlank method.
Updated
Manual Merge with feature.
Removed updates.
Merge pull request #3 from FairyTail/feature-advance

DateUtil updates
Added FairyJill updates.
Merge pull request #4 from FairyTail/feature

Feature -> Master