Ticket #3510: use option to hide grid in web spreadsheet

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@27502 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
Automatic update of propset svn:ignore via for svnignore.txt's by svnignore

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@27503 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
Added test cases for Tangent, added some test cases from Mike.

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@27504 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
AGAIN: avoid nullPointerException

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@27505 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
Convenience method evaluateDouble

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@27506 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
Convenience method evaluateDouble

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@27507 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e