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

version 2.2.0

version 2.1.8

version 2.1.7

version 2.1.6

fixed bug in regex in CellEntry::setCellLocation