Merge commit 'fb54c12dcae2c338b1550dfc8b5a5a76af86cfba' into tarek-develop

* commit 'fb54c12dcae2c338b1550dfc8b5a5a76af86cfba':
  Add SILK-142: Help message for each panel
  Fix SILK-143: Null values in time filter when loading dashboard from gist
Update README.md before officially release 1.4
Merge remote-tracking branch 'upstream/develop' into develop
Add modifications to help message