TemplateProcessor: remove rehash() inlining, simplify some spagetti if/else
HPPCRT-23 : Priority queues some refactors:
- getComparator() renamed to comparator()
- changePriority() and refreshPriorities() renamed updatePriority() and updatePriorities() to reflect their fonction more.
HPPCRT-23: Heaps API additions inspired by fastutil (http://fastutil.di.unimi.it)
which are indeed interesting to have :
- updateTopPriority() : update prio of the top() element (all heaps)
- topKey() : gives the key of the top() element for the IndexedHeap