Added randomfilesize
BoltDB added and it all compiles
Builds and runs.. although super slow
Fixed issues on boltget.

BoltDB is still VERY slow, I am probably doing something
wrong.
Cleaned up bolt functions
Added unit test
initial version of iocache
Fixed iocache evictions
Set CLOCK on insertions
IoCache Tests
Added LevelDB
Fixed eviction code in LevelDB.

Still looks very weird.  The evictions go slope increases
while the read hit rate decreases.  I must have a bug
somewhere else.
Added extremely simple leveldb tests
Combined iocache and leveldb
RocksDB with iocache support
Added iocache boltdb support
Isolated kvdbs under a new package
Removed unnecessary caches
Iocache to KV db backend
Added support for IoDB