Merge pull request #182 from wgerlach/master

added dockerimages widget
added dockerimage text download
Merge pull request #183 from paczian/master

added dockerimage text download
fixed query url for asynch tables without ? in the base url
fixed references in asunch mode when using multiple tables on a single page
fixed header height in case of no sortable column
added tree renderer and test pages
still needs documentation
Merge pull request #184 from paczian/master

table fixes and tree renderer
added documentation
Merge pull request #185 from paczian/master

added documentation
completed documentation
added callback function
added popover tooltip
added multiple options
Merge pull request #186 from paczian/master

finished initial implementation of tree renderer
added column mapping for asynch table update
fixed url building (? vs &)
width and height default update
added quote in description bugfix
Merge pull request #187 from paczian/master

asynch table fix and tree quotes bugfix
added envo api example
added onkeypress to tree input box
Merge pull request #188 from paczian/master

added envo api example
fixed bug in expand all
Merge pull request #189 from paczian/master

fixed bug in expand all
layout update for node div