Fixed compile error.
- fix for BUG 1928: ensure we don't de-reference NULL object
- fix for bug1929: ensure that layout window is removed from the main menu
- fix for bug1927: generate invisible glyph for general formation / degradation of elements
- fix for Bug1930: ensure that render package is enabled (if COPASI is compiled with render support), so that the objectRole can be exported
- add invisible style to all default styles
- fix for issue 1931: the layout ought to be positive
- added a new method moveBy(const CLPoint&) to CLBase and implemented where necessary
- this is called in CQGLLayoutPainter, when assigning the new bounds
- always move layout into the upper left corner, so that it is always visible in the animation mode
rename "Increment" to "Bin size" in Histogram widget
preliminary support of the new general glyph
fix typo
- read general glyph from SBML, add rendering of ReferenceGlyphs (if role is used)
- export general glyphs to SBML
some work in progress about layout creation
small progress in layout creation
more progress in layout  creation
more progress in layout creation
deactivate testing code that was accidentally committed
small progress in layout creation
Compartment Copy options with dialog
work in progress: modifiers in layout creation
- improved error messages in case flattening fails