Moving axis related code to axis factory.

git-svn-id: https://svn.code.sf.net/p/genoviz/code/trunk@14899 80d5a9c2-7d8c-4c9f-9369-4e03bca4d2bd
Refactoring and adding constants in Axis glyph factory.

git-svn-id: https://svn.code.sf.net/p/genoviz/code/trunk@14900 80d5a9c2-7d8c-4c9f-9369-4e03bca4d2bd
Merge remote-tracking branch 'upstream'