fix failing Ruby tests on 64-bit Linux
remove debug output
fix compilation on Mac OS X (10.8.5)

tre library code triggers self-assignment warning, patched tre-compile.c
Merge pull request #244 from satta/ruby64

fix failing Ruby tests on 64-bit Linux
fix failing gttestdata tests

these changes require a new gttestdata as well, please pull.
Merge pull request #247 from satta/mac_compile_warn

fix compilation on Mac OS X (10.8.5)
Merge pull request #248 from satta/gttestdatafails

fix failing gttestdata tests