Revert r2939 (allocation strategy scheme for arrays). Which means old (slow?) speed for now. Reason is that 
assignment would otherwise depend on allocation strategy which isn't a good idea. Also some problems due to 
default template parameters which got ignored in copy-constructor and operator= which caused those functions 
not to be called. 


git-svn-id: svn://svn.code.sf.net/p/irrlicht/code/trunk@2946 dfc29bdd-3216-0410-991c-e03cc46cb475