Cleaning: get rid of m2html/private/strtok.m which was a modified copy of strtok from matlab toolbox (overloaded function).
Replaced by strtok2.m which call strtok.m from matlab toolbox.

git-svn-id: https://svn.code.sf.net/p/dct/code/trunk@924 4c865b51-4357-4376-afb4-474e03ccb993