Correct typos in Android functions and references
Fix bug in pasting Excel tables with empty cells

Empty cells were being incorrectly stripped in tables pasted from
Excel, messing up table structure, causing mismatched columns,
incorrect number of cells per row, etc. Fixes #7149
(http://www.tinymce.com/develop/bugtracker_view.php?id=7149)
Merge pull request #426 from ericpedia/master

Fix bug in pasting Excel tables with empty cells