A bit of code maintenance/simplification

git-svn-id: svn://svn.code.sf.net/p/openfoam-extend/svn/trunk/Breeder_1.6/other/waves2Foam@2015 e4e07f05-0c2f-0410-a05a-b8ba57e0c909
Faster evaluation of irregular waves

git-svn-id: svn://svn.code.sf.net/p/openfoam-extend/svn/trunk/Breeder_1.6/other/waves2Foam@2016 e4e07f05-0c2f-0410-a05a-b8ba57e0c909