Fix normal() and binomial() functions when domain extremity is infinity.
Issue 258: lists and tuples should be evaluated too if mode is set to approximate calculation.
Improve strings handling in parser.
[Issue 261] When moved, a tab freezed.

Wrong menus were displayed too.
Rename wxlib to qtlib, and wxcanvas to qtcanvas.
Add option `--restaurer` to launch geophar and restore previous session.

Useful for debugging (with shortcut `!!!` in command line.)
[Issue 230] Some real solutions were not returned by solver.