
* Create some documentation for the Depcached API

* Needs stats commands to give insight in the usage of depcached

* Add (optional) weight to cached entries, so that entries that are expensive to regenerate have lower chance of 
  being flushed by the garbage collector
  
* Make the garbage collector more aggressive when we are running out of memory

* Add a queue mechanism with queue/dequeue options (fifo)

* Profile, and optionally use the Google perftools malloc/free to speed up the malloc/free.
