Merge branch 'release/0.11.4' into develop
add link to grouping.html
Added beforeCopy hook
Renamed beforeCopy to beforeCellCopy
Merge remote-tracking branch 'origin/master' into develop
Generated handsontable dist versions.
Created beforeCellCopy tests.

#1053 https://trello.com/c/RSsWK4Ec
Merge remote-tracking branch 'origin/develop' into gh-pages