Added module description; documented copy-to, rename-to, xtc-ensure-file, xtc-write-output and some more.
Added module description; documented copy-to, rename-to, xtc-ensure-file, xtc-write-output and some more.

svn path=/trunk/StrategoXT/; revision=13186

lichtemo/strategoxt,Apanatshka/strategoxt,metaborg/strategoxt,lichtemo/strategoxt,metaborg/strategoxt,lichtemo/strategoxt,metaborg/strategoxt,Apanatshka/strategoxt,Apanatshka/strategoxt,lichtemo/strategoxt,Apanatshka/strategoxt,Apanatshka/strategoxt,lichtemo/strategoxt,metaborg/strategoxt,metaborg/strategoxt