Update www/nginx to version 1.4.4_2,1
Update devel/py-mimeparse to version 0.1.4
Update textproc/itstool to version 2.0.1
Update lang/gcc48 to version 4.8.3.s20131128
Tweak devel/libedit version 2.6.10_2
Update devel/py-robotframework to version 2.8.3
Update mail/rubygem-mail to version 2.5.4_1,1