pen and stylingBar

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@25345 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
Intersection point tool : conic-conic

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@25346 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
Intersection point tool : conic-line

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@25347 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
[giac] floats printed with E instead of e, first attempt to improve Nsolve

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@25348 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e