Preparing CHANGELOGs for 1.6.3 final release.
Version bump to 1.6.3 final.
- Guard darwin CFLAGS against GCC.
Merge pull request #1131 from zenspider/gcc-vs-clang

- Guard darwin CFLAGS against GCC.
Actually try if CC accepts the flag instead of guessing from the compiler name.
Version bump to 1.6.3.1 and CHANGELOG updates to match.
Re-reordering build_all ... having trouble with the windows builds.
test_all should fail if you don't have the ruby version installed.
Small change to test_all, reordering the rubies.
Duh, I have errexit set, no need to explicitly exit.
Ugh, 1.9.2.
Make sure ENV['CFLAGS'] is valid before making further tweaks to $CFLAGS.
Improve a comment with regard to a workaround for Apple clang.
Fix iconv detection when --with-iconv-dir or --with-opt-dir is specified multiple times.
Merge branch 'master' of github.com:sparklemotion/nokogiri