new method added to update worksheet

fixed bug in row and col count in worksheet

Added support for batch inserts

Added sorting/filtering support and also modified ListFeed to provide…

… data exactly as supplied by google without any processing

issue asimlqt#41 - Made ListFeed::getColumnNames() Method Public

issue asimlqt#34 - Added optional token type parameter to service req…

…uest constructor method

issue asimlqt#29 - added CDATA around request values

issue asimlqt#28 - Fixed column/row mismatch