Hardcode centimetres

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@27703 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
lots of refactoring

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@27704 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
fastbutton

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@27705 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
code cleaning

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@27706 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
Take 30 materials from API

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@27707 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e