Fixed typo.
WIP: Section "Example graphs".
Corrected "@" to "@@" in email for Roxygen.
Note about 'permutations' calculation time.
We use '.jcall' instead of 'J' so that we can call 'getJavaInfo' in '.onLoad'.
Added example graphs.
Florian's email.
More precise: 'parent' is CreateGraphGUI, not just any JFrame.