added regex tester
display wrong expression error on regex tester
logdb service can accept pagesize limit, bar chart supresses null values error
moved some style definitions
added crlf filter for displaying query result with line break
widget only can refresh at data loaded. prevent spanless refresh widget (no more broken graph)

query result & query input directive use isolataion scope
when query result has too many columns, render partially and display 'more' button. added pager directive
logdb service supports observe query list for angular directive. added more informative functions
added callback for onTimeline/onStatusChange. added graphical feedback on queryInput/queryResult directive.
implemented jump page in pager
fixed bug about status of query does not apply immediately
added license icon
added ng-change event to queryInput
remove unnecessarily $apply method for initializing logdb instance
added rextester parser
added license management
added run method to queryInput. if a query instance try to create query more than once, then throw error.
added getInstance method to queryInput. added getQueryStatus method to query instance
logdb service is now support to background query. added bindBackgroundQuery method to queryInput.

added 'started' type async method for chaining.
logdb status text changed.
added license management logStats graph and logAlerts graph