Added trucation type 'quarter' and get_quarterspan
Added trucation type 'quarter' and get_quarterspan

Change-Id: I1aacefce1c5e15dd6d1acddfee8f7ae915a6c75a
Reviewed-on: http://gerrit.hudora.biz/423
Reviewed-by: Christian Klein <4bdfcb85e305af38327b20317efc0b69be3f0656@hudora.de>
Tested-by: Christian Klein <4bdfcb85e305af38327b20317efc0b69be3f0656@hudora.de>

hudora/huTools