Replaced standard function blocks library definition from dictionary to plcopen xml files

Fixed bug when printing program generating errors and warnings in PLCOpenEditor

Fixed bug with return type in elements that don't need return type tree and dimension

Removed obsolete process for customizing block code generated in extensions

Fixed bug when modifying project properties

Replaced old pou variable list and variable tree generating by xslt stylesheet

Merged

Fixed bug with direct array variable type definition

Fixed xmlclass and plcopen using precompile xpath where possible

Fixed undo/redo with xmlclass refactoring

Removed obsolete functions for extracting values for xml dom tree and generating xml string

Removed dictionaries storing datatypes and pous defined in project and pou and datatype using tree from model

Removed dictionaries storing enumerated datatypes values, subrange datatypes range and project datatype hierarchy from model

Removed namespaces declaration in subtree elements xml description when copy/paste

Fixed copy/paste with xmlclass refactoring

Fixed SFC block edition and SFC to SFC_textual code generating