Fix the resolution of the timestamp of cache_control file
Increase the resolution of the filestamp
computeFromPath will consider the cached item expired if the value is undefined
getControlFileTimestamp will use _getFileTimestamp
controlFileExpired will consider a missing cache_control file as expired
Refactor to make resolution more readable
Updated NEWS file
Updated pod doc
Merge pull request #238 from jrouzierinverse/feature/timestamp_resolution_standardization

Fix timestamp solution to catch sub second changes in file