added PHPunit 3.7 to the framework requirements
added new delete() method to Fieldset
updated the installation instructions
base64 encode hash in URL

The hash needs to be base64 encoded to reliably get passed back.
*URLencode will not reliably pass back the hash.
Merge pull request #653 from mikepmtl/patch-3

base64 encode hash in URL
Merge branch '1.8/develop' into upstream-1.8-merge

Conflicts:
	installation/instructions.html
	packages/auth/examples/auth.html
	requirements.html
Merge pull request #569 from kenjis/upstream-1.8-merge

本家 1.8/develop をマージ