Cleaning code

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@25268 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
[giac] for for Covariance[{(ñ, ñ), (2 ñ, 3 ñ), (3 ñ, 4 +2 ñ)}] + tidying

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@25269 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
[mathquill] check whether geo is italic

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@25270 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
attempt to make JNI version of Giac work with Proguard

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@25271 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
4.9.126.0

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@25272 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
[giac] fix for (a, b, c)⊗ (d, e, f) (mistake in r25269) + tidying

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@25273 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
Removed debugging messages

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@25274 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
Ticket #3265: fixed my fix

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@25275 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e