client side pairing

This is much less beta than the last release, includes everything required for a 2.4 level release except for refund management.

md5

v0.2.4.zip 51deb857ef77f4245c418a161e7b4b20
v0.2.4.tar.gz f2a37f6680c6b04573e7ffc8a95db0a5