Added more flexible cache mode selection to TimberLoader.
Added more flexible cache mode selection to TimberLoader.

All options are now constants for TimberLoader and default can be set either by extending TimberLoader and overriding $cache_mode, or by adding a filter to timber_cache_mode.
lucasmichot/timber,joelgarciajr84/timber,Jmayhak/timber,jnweaver/timber,gchtr/timber,xavierpriour/timber,PrisisForks/timber,anugupta/timber,asecondwill/timber,rpkoller/timber,pensesmart/timber,Jmayhak/timber,PrisisForks/timber,pensesmart/timber,mgmartel/timber,mojaray2k/timber,jnweaver/timber,anugupta/timber,timber/timber,mojaray2k/timber,xavivars/timber,rpkoller/timber,aaemnnosttv/timber,Jmayhak/timber,jarednova/timber,aaemnnosttv/timber,mgmartel/timber,asecondwill/timber,josephbergdoll/timber,jarednova/timber,timber/timber,mgmartel/timber,xavierpriour/timber,blocher/timber,ogrosko/timber,josephbergdoll/timber,josephbergdoll/timber,gbarberi/timber,joelgarciajr84/timber,xavivars/timber,xavierpriour/timber,joelgarciajr84/timber,asecondwill/timber,ogrosko/timber,gbarberi/timber,ogrosko/timber,gbarberi/timber,aprendiendoando/timber,xavivars/timber,aprendiendoando/timber,PrisisForks/timber,aprendiendoando/timber,anugupta/timber,asecondwill/timber,jnweaver/timber,rpkoller/timber,lucasmichot/timber,jarednova/timber,blocher/timber,blocher/timber,gchtr/timber,gchtr/timber,pensesmart/timber,aaemnnosttv/timber,lucasmichot/timber,mojaray2k/timber