change the parser to not attempt to parse the elements following
'from' unless there is a actual 'from'
improve the symbol parser to try to deal with issues when symbols are
next to eachother with no intervening whitespaces
improve number literal parsing to fail if there are trailing letters
or digits which aren't part of the number and aren't separated with
whitespace
add some code to start analysing the quality of parse error messages
enable the postgresql tests, comment out the failing ones and add
notes on how to get them working
move the tpchQueries data to the Language..Tpch module
fix the cabal file for the new tests
