version 1.21
 - added the possibilities to reduce the width of a text field to minimum.
 - the undo/redo functions are improved.
 - documentation update 

version 1.19.02
 - internal bug-fixes
 - documentation update 

version 1.19
 - added a possibility of adjusting color while saving the image
 - added a possibility of moving elements in Select mode using keyboard
 - in the Select mode if the group of elements is selected while changing any 
attribute (for instance font size or line width), only this attribute will change for all 
elements of the group leaving the rest unaltered.
 - internal bug-fixes

version 1.18
 - initial version
