add gtkstyle in qt build

adress issue #22 (Qt apps looking non-native on e.g. Ubuntu)
fix shiboken and pyside meta.yaml

fix issue #23 (use of internal Continuum urls)
add qt compilation requirement for gtkstyle
testing new no_softlink option
remove unused code
Start pyqt recipe
Add a recipe for sip

Only works on Mac OS X for now
sip should depend on Python (I think)
Test sip import
fix name of sample recipe
Some more attempts at pyqt
Fix sip for linux
Add patch
Add linux url for pyqt
Fix pyqt linux md5
Trying to make pyqt work on linux
Set a QMAKESPEC for linux
Create the symlink to the expected anaconda1anaconda2anaconda3 path
Fix pyqt build
Add test for PyQt