WL-3239 - Switch the default behaviour so that WebLearn page headers (in Resources) always use standards mode

Adding logic to say that if WebLearn mode == 'auto' then add DOCTYPE
WL-3239 - add back a comment about the possible values (from 2.8.x)
WL-3239 - String first in equals to avoid possible NPE
Merge pull request #34 from ox-it/WL-3239

WL-3239 - Switch the default behaviour so that WebLearn page headers (in...