jsxgraph/jsxgraph — pull request #111 by benbro (2014-09-26 03:11:30+00:00)
Title: Support hidden axes in the geogebra reader

The geogebra reader need to create a hidden axis if an intersection point use it.
This fix the following example.
https://drive.google.com/file/d/0B12AhxvnYHrAYlhKaTRBLU9XNjA/edit?usp=sharing

Feel free to add it to the tests.