9.3 compatibility
add cibuild
fixed includes
switch to 9.3 before testing and switch back after testing
fixed imports for pre 9.3 versions
run tests for 9.2 as well
ignore regression out
move htup_details inclusion
like in https://github.com/postgres/postgres/commit/c219d9b0a55bcdf81b00da6bad24ac2bf3e53d20
Merge pull request #3 from adeven/pg_93

9.3 compatibility