 * restructure to groups new functions in scala.math package
 * restructure to groups new functions in scala.math package

 * bugfixes

lrytz/scala,martijnhoekstra/scala,martijnhoekstra/scala,lrytz/scala,martijnhoekstra/scala,lrytz/scala,scala/scala,lrytz/scala,scala/scala,scala/scala,scala/scala,martijnhoekstra/scala,scala/scala,scala/scala,martijnhoekstra/scala,martijnhoekstra/scala,lrytz/scala,lrytz/scala