added: alfa of common datatypes schema
added: test usage of alfa version of commond datatypes chema
common types stuff
changed:
 - common datatypes not directly included in xml schema language (File,
Collections) - in near future, probably all types will be moved into
this new namespace
 - the classes using bindings for external datatypes can specify use of
adapted classes with @XmlJavaTypeAdapter annotation, otherwise classes
directly derived of the schema will be used
 - UniMocker xml schema to import new common datatypes namespace and
schema for that namespace -> usage of new datatypes namespace in
UniMocker - still experimental
changed:
 - UniPlayer now uses externalized datatypes
 - player_scenario.xml sample scenario altered for externalized
datatypes

added:
 - Common datatype classes got @XmlJavaTypeAdapter so now it is not
necesary to explicitly specify the adapter on field in class using these
types

source code cleanup
changed: elements of internal xmlschema types moved to external
datatypes
removed: orphan TVoid type
changed: project execution environment in UniMocker & UniPlayer
forgot to remove TVoid from ObjectFactory
added: override of toString method on TNull class, method returns string
(TNull|TAnyValue) of (String, BigInteger, ...)
changed: all sample scenarios now use extracted datatypes
removed: old backup file
removed: old dummy project for texting UniMocker
removed: old safety bkp packages
updated: api and schema documentation