adding copy/paste support from excel-compatible clipboard
some cleanup and options
little improvements
timer variable as private
range robustness
suggestion and todo
split character more permissive
calling default serializer/unserializer from the column definition
ability to copy one cell data and paste it to multiple cells in one move
Merge https://github.com/mleibman/SlickGrid
Use a properly formatted hidefocus attribute

If the document was served with Content-Type application/xhtml+xml,
browsers require the document to be valid XML. Without this commit
SlickGrid generates XML parsing error and creation of the grid will
fail.
Properly quote attribute values
Bugfix init Jquery UI Sortable Widget +1.9
fixed typo. backround to background in style definition
Fix Safari 6 toString() defaultFormatter() bug

On Safari 6 in Lion, the toString() method will fail on numeric data if
the Error Console is not open. By using string concatenation, this gets
around this strange Safari bug.
Lets ignore .DS_Store Files
removed MAC-specific cruft file
gitignore editor bak files to prevent clutter
added API getHeadersColumn() a la getHeaderRowColumn() so we can get a handle on each of the topmost header columns.
Merge branch 'Celebio-excel-import-export': included work for https://github.com/mleibman/SlickGrid/pull/359