Merge branch 'uidev' into uidev-dashboard
Merge branch 'uidev' into uidev-dashboard
sample dashboard extension added
onHead, onTail event added to logdb service. added TableView directive.
sample apps added & sample app import code added.
app directory path changed
each extension code are wrapped in code block. helper functions added to serviceExtension.
missing file added
temporarily hide adding widget extension markup
Merge branch 'uidev-dashboard' into uidev