This reverts commit aeb128c5.

It exists already in base robotpkg, was a bit blind :)

YAML parser and emitter for Python

YAML is a data serialization format designed for human readability and
interaction with scripting languages. PyYAML is a YAML parser and
emitter for Python. PyYAML features a complete YAML 1.1 parser, Unicode
support, pickle support, capable extension API, and sensible error
messages. PyYAML supports standard YAML tags and provides
Python-specific tags that allow to represent an arbitrary Python object.
PyYAML is applicable for a broad range of tasks from complex
configuration files to object serialization and persistance.

Updating use of QWT to be able to use last version of the lib
Minor fixes

Modifying Makefile for install options qtstudio,qtremote,xforms

Made during CHRIS integration week