Created initial version of table columns for ticket #601
improvements for better readibilty and simpler code. Referring to ticket #612
Created branch for ticket #601
Implemented ticket #604 "Table column heads without underscores"
added the justify string function as described in ticket #612
Removed merged branch for ticket #554
Merged changes for ticket #554 to trunk "Enable complex numbers"
Resolved a parenthesis issue introduced with earlier commits for #554
Added missing icons
initial commit for ticket #612