Added error handler for uncaught errors in TableExplorer
Fixed extra paragraph when new table is added in TableExplorer
Removed cellSpacing option in TableExplorer
Added initial work for tab to next text flow when in table cell. Basic functionality is working
Added selectLastPosition and selectFirstPosition methods to ISelectionManager
Added selectCell to SelectionManager
Added getNextCell and getPreviousCell to TableCellElement and getCellAt to TableElement
Merge branch 'master' of https://github.com/Harbs/TLF-Table-Work
Selects the contents on tab rather than position the cursor at the end of the text flow