keys limited to 64 chars, not 128

[ifeghali]

the documentation states that keys are limited to 128 characters but in fact http://api.openkeyval.org/store/ is refusing keys greater than 64 chars.

[donmccurdy]

Ran into the same thing; this was a bit frustrating to debug. If the documentation could just be updated that would be awesome. (Also, the link to your GitHub repo is no longer correct).