gstreamer-gi: fix initialize @initialized location

Reported by Vincent Carmona. Thanks!!!
gstreamer-gi: don't override Gst.init

Reported by Vincent Carmona. Thanks!!!
gstreamer-gi: don't add $0 to arguments
gi: use Rubyish method name for constructor and function
gstreamer-gi: use Rubyish method name

Reported by Vincent Carmona. Thanks!!!
gstreamer-gi: priority of add_watch can be omitted

Reported by Vincent Carmona. Thanks!!!
gstreamer-gi: add convenience methods to Element

Reported by Vincent Carmona. Thanks!!!
clutter-gtk: fix initialize @initialized location
clutter: fix initialize @initialized location
goocanvas-gi: fix initialize @initialized location
webkit-gtk: fix initialize @initialized location
clutter: don't override Clutter.init
poppler: remove deprecated GDK support
fix syntax error
Merge pull request #129 from tmtm/master

fix syntax error

Patch by TOMITA Masahiro. Thanks!!!
gi: don't raise exception when two or more out arguments exist
gst-gi-sample: ports helloworld.c
Merge pull request #130 from ted-n/gstreamer-gi-samples

gst-gi-sample: ports helloworld.c

Patch by ted-n. Thanks!!!
gstreamer-gi: add missing copyright
gstreamer-gi: use "." for method call