disable some tests on Mac
update CHANGELOG
Merge pull request #258 from satta/mactests

disable some tests on Mac
Merge pull request #259 from satta/prerelease

update CHANGELOG
disable gt_seqlensort test on Mac
Merge pull request #260 from ggonnella/no_seqlensort_test_on_mac

disable gt_seqlensort test on Mac
update html
Merge pull request #261 from gordon/http

update html