Merge pull request #11 from Susurrus/master

Bunch o' fixes
got rid of fossilized menu items
Display format now defaults to Raw Hex and is inactive until meta data file is loaded
Changed the filter by value default text to
Added color to a cell when filter is active
Fixed a bug that allowed user to edit the messageInfo name
Improved robustness of the XML parser.
Also changed XML import code to raise an exception when errors arise.
Added a 'format' field to the messages for specifying if CAN messages are standard or extended.