new class sostpp
changed the s.o.s. typing mechanism, introduced separate element typemarks
new class sostpp
completely reworked sos-type mechanism
Merge branch 'sostyped' of https://github.com/utelity/hidden2statspat into sostyped

Conflicts:
	R/MakeHidden.R
	R/sostpp.R
retransformed / backtransform also for transformation functions
data sets removed, will be sent in separately
bug fixes, doc fixes
Multiple bug fixes, particulary with labelling (ouf, this is awkward with fv)
Updated documentation

Name changes:
makehidden -> as.sostpp (unified)
Khidden -> estK
Lhidden -> estL

new package name:
sosspp -> sostatpp
getlasttype -> currenttype