1. remove all wavelet function
2. add getL to internal function list

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/refund@174 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
1. remove splines from import list because splines package is removed from cran list

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/refund@175 edb9625f-4e0d-4859-8d74-9fd3b1da38cb