Update ChangeLog with latest changes
Fix 'make check' to be able to work only with local nad directory as PROJ_LIB and without requiring extra grid files
Add extra test to show need for r2482 (#229)
make check: update rHEALPix tests from healpix_nad_test_2013-07-25.patch (#219)
multistresstest.c: fix a few warnings on Posix
Make pj_gridinfo_load() thread-safe (#228)