updated build instructions
simple help-patches
ignore binary files
case-insensitive colorspace
make colorspace optional

and default to RGBA
use ctor-initialization
switch to A_GIMME and make fps optional

additionally, allow fractional notation for fps (e.g. "25/2")
initialize pdgst in pdgstGem setupcallback

so `s_pdgst__gst` is set when we call class_addmethod()
pushed version to 0.1
use version from pdgst-meta
added missing function declaration
reducing compilation warnings
use [teapot] rather than [rectangle]

so the Gem-part of the hybrid chain does something that is not possible
with pure GStreamer