Implemented grey out functionality
ADDED: greyRows() to grey out the selected rows as per DynaTable
ADDED: getRowTables() similarly to getRows() in DynaTable
ADDED: getRowIndexFromKey() similar to column index lookup
ADDED: GreyOut toggle button and hookups
ADDED: GreyOut style
Merge pull request #14 from Hiblet/GreyOut01

Implemented grey out functionality