Upgrade wxgtk30 from 3.0.2 to 3.0.3.1 Change the MASTERSITE from SF to GITHUB

[rodrigo]

Summary

Built sucessfull on poudriere for "FreeBSD 10.3-RELEASE-p16 amd64" with the following ports who depends on it
audio/wxguitar
audio/spek
audio/mbox
audio/py-karaoke
audio/sooperlooper
audio/audacity
sysutils/abgx360gui
sysutils/abgx360gui
sysutils/abgx360gui
sysutils/freefilesync
sysutils/passwordsafe
sysutils/passwordsafe
sysutils/hachoir-wx
games/slade
games/asc
games/golly
games/odamex
games/megaglest
games/megaglest
games/pyfa
games/freedink-dfarc
games/wxlauncher
games/wxlauncher
games/wxlauncher
games/trenchbroom
databases/pgadmin3
multimedia/photofilmstrip
multimedia/dvdstyler
multimedia/aegisub
comms/quisk
comms/cwstudio
comms/gnuradio
comms/freedv
emulators/wxmupen64plus
emulators/dolphin-emu
emulators/bochs
misc/metalink-editor
astro/opencpn
deskutils/taskcoach
deskutils/cycle
deskutils/wammu
deskutils/treesheets
finance/moneymanagerex
x11-toolkits/py-SquareMap
x11-toolkits/p5-Wx-Perl-ProcessStream
x11-toolkits/p5-Wx
x11-toolkits/hs-wxcore
x11-toolkits/p5-Alien-wxWidgets
x11-toolkits/hs-wxc
x11-toolkits/hs-wx
x11-toolkits/py-wxPython30
ftp/filezilla
x11-wm/obapps
math/fityk
math/saga
math/gambit
math/wxMaxima
math/plplot
security/veracrypt
devel/drpython
devel/boaconstructor
devel/wxGlade
devel/wxformbuilder
devel/py-robotframework-ride
graphics/gtimelapse
graphics/delaboratory
graphics/wxsvg
graphics/hugin
cad/gspiceui
cad/kicad-devel
cad/kicad
science/gnudatalanguage
textproc/gutenmark
textproc/plover
editors/codelite
editors/p5-Padre
editors/poedit