1.2.0

This release has 20 issues closed since 1.1.0.

Highlights of this release are:
#7041 display flint TimeSeriesRDD with table widget
#7289 autocomplete for classpath add magic

Issues closed include:
#7472 Maven classpath order is non-deterministic and Spark UI is affected
#7718 URL arguments accessible from notebook
#7722 Big int64 is not displayed correctly in Table
#7723 EasyForm incorrectly display legend element on Lab
#7743 Histogram Groovy has wrong scale for default mode
#7745 Grid OutputContainer works wrong
#7746 Cycling Output Container displays empty plots
#7758 Legend element displays empty
#7775 Autotranslation does not respect set_index for pandas dataframe
#7779 Regression in Histogram axis labeling
#7780 %classpath add mvn: NoSuchFileException
#7804 Better handling for pandas stacked column dataframe