add '-seed' option to testsuite.rb
Merge pull request #132 from satta/seed

add '-seed' option to testsuite.rb
make tre compile on windows 64-bit
make gt_file_find_exec_in_path() work on Windows
Merge pull request #133 from gordon/tre

make tre compile on windows 64-bit
Merge pull request #134 from gordon/windows

make gt_file_find_exec_in_path() work on Windows