new Dislin version 11.6
AxisSystemDialog and Wiget
canceled unnecessary test directory
adapted installation documentation
P8010 notebook
updated build system; working on Graph (not yet finished)
dummy Makefile.am for Qt5 branch
Graph basic functionality and Dislin implementation updated
simplified file and object names in Dislin branch
adapted build system, using -Wextra in default of --enable-compilerWarnings
