[refactor] 
* use spells configuration (all timed effects for battle spells)
* a few more cleanups
+register erm resource types (useful in future and less noise in log now)

git-svn-id: https://vcmi.svn.sourceforge.net/svnroot/vcmi/trunk@3097 4dfc6b2a-8b31-0410-aa91-d6c70e3ac834