* started adding basic lru cache system
* Added basic LRU cache including Add Get Remove Contains ContainsOrAdd Clear
* wording changes on comments
* removed exported var's in strut as they are not required
* Added README
* README updates
* rm line :D
* swapped to mutex over rwmutex updated comments
* unexported getNewest & getOldest
* unexported getNewest & getOldest
* Updated comments and cited references in source
* updated comments