abs_path() throws an exception on cygwin if the file is not there
some MSWin32 support
remove superfluous single quotes
cygwin support for t/02-install-no-postgis.t
portable paths
fix scoping errors revealed by use strict
fix pg_dump temp file locking issue
test still requires psql, even if scratch + test dbs are set correctly
use test/scratch db for postgis test
Merge pull request #22 from plicease/windows

testing using persistent test database