Allow Z_ORDER_LAT_LON to apply to either one or two columns.
Added more tests of Z_ORDER_LAT_LON with one argument.
updated readme parser
updated on comments
merge SytzeH: Update README local install section

Merge pull request #139 from SytzeH/sql-parser/readme
https://github.com/FoundationDB/sql-parser/pull/139
merge geophile: Allow Z_ORDER_LAT_LON to apply to one column

Merge pull request #138 from geophile/sql-parser/geophile-integration
https://github.com/FoundationDB/sql-parser/pull/138
Everything for SYSTEM_USER was here except the actual parsing.