reading XML numbers improved

The reading of Numbers from XML (plain text form) was improved.
The functions for reading and storing XML numbers can be found in fibDatatyps.
Now simple formulars can be given and the german decimal point ',' will
be understod.
first instable version of the Fib creator

The Fib creator is an application, with a grapical user interface, for
creating and changing Fib objects.
This version dosn't run stable and implements just some primitiv functionality.
valgrind for memcheck

Using now valgrind for the memory check (testruns/basicMemtest.sh).
Some minor changes and bugfixes for it.
Choose Fib object dialog + FEATURE_INSERT_OBJECT_IN_ELEMENT implemented

Choose Fib object dialog

A new subwindow of the Fib creator GUI.
In this subwindow Fib objects can be displayed and selected.
It is for giving easy access to Fib objects.

FEATURE_INSERT_OBJECT_IN_ELEMENT implemented

With this feature a new version of insertObjectInElement() is implemented.
If the insert position is a list element, the insert object method will
now add the to insert Fib object into the list element on the position,
instead of creating a new list element.
Also if the "first" parameter (if true: the inserted object will be the
first subobject) is false, the inserted object will be inserted as the
last subobject of the branch element.

Some more minor bugfixes and changes
Addition to documentation
Merge branch 'creator'