Added documentation around rate limiting

Updated version to 5.0.3

Merge branch '5.0.3-rc1' into milestone/5.0.3

Merge branch 'gh-360' into milestone/5.0.3

Updated date formats to use locale-specific formats

Added messaging indicating whether cached or new signatures, etc. are being used

Added user agent to updater requests

Added user agent to NOC1 requests

Updated version to 5.0.3rc1

Updated Wordfence Intelligence client to use the new v3 API

Updated version to 5.0.2

Further adjusted configuration docs

Merge branch 'milestone/5.0.2' into gh-341

Updated version to 5.0.2rc7

Corrected typo in docs