added concurrent hash map
added empty cpp file for only header files
fixed naming of method: downgrade
update test regarding last method rename commit
implemented new versions of fixPage & unfixPage aside old methods. IMPORTANT: has compile error atm since buffer frame replacement is not yet implemented
better statistics collector
simple fix to allow code compilation
save point
fixed .. FUCK U CPP ..
cleaned up and added statistics
restructured namespaces
cleaned up buffer manager
cleaned buffer frame
added swap out strategies
removed global locks from concurrent hash
added spin lock to buffer manager
added more spin locks
added two queue
no more global locks (except file)
final comments