Bitmap: not allocation when the rectangle copy is a full image
bmpcache: copy Bitmap only when necessary
optimize the memory of BmpCache::Finder
optimize BmpCache::reset
fix key compare
optimize the memory of BmpCachePersister
Merge branch 'future' of https://github.com/wallix/redemption into memopti
replaced memcpy to copy ctor
fixed BmpCachePersister and BmpCache
pre-allocation of Bitmap in BmpCache (WIP)
fixed test_bmpcache
fix memory leak
BmpCache cleaning
fix valgrind error and code cleaning
backtrace utils
fixed compilation of test_bmpcachepersister
fixed compilation
fix tests failures
fixes BmpCache::cache_bitmap
fixed conflicts