[ctioga2] switch to my own drawing of the ticks, with the nice side-effet that no ticks will appear outside from now on
[ctioga2] fix problem in fallback to old colormap parsing
[ctioga2] fix the problems drawing some axes
[ctioga2] some more tests
[ctioga2] go back to the exact original behaviour of Tioga for the axes
[ctioga2] smarted default alignment that also works for multi-line labels

Well, at least most of the time