allow setting of keepalive handler

adds the keepalive keyword to the client LWRP so you can set a client
specific handler for keepalive events
[redis] switch to redisio cookbook
Merge pull request #185 from portertech/redis

Switch to redisio cookbook
[timeout] bumped sensu default version, check/mutator/handler timeout
Merge pull request #186 from portertech/timeout

bumped sensu default version, check/mutator/handler timeout
version bump
version bump, redis cb change is not minor
Update Vagrantfile

Updated for the installation of curl and omnibus automatically for Ubuntu.
bumped default version of sensu to 0.11.3-1
Merge pull request #190 from portertech/sensu-0.11.3-1

bumped default version of sensu to 0.11.3-1
Merge pull request #188 from jjasghar/patch-1

Update Vagrantfile
updated vagrantfile, new base boxes, improved install chef
Merge pull request #191 from portertech/vagrantfile

updated vagrantfile, new base boxes, improved install chef
minor version bump
bumped default version of sensu to 0.12.0-1
Merge pull request #192 from portertech/sensu-0.12.0-1

bumped default version of sensu to 0.12.0-1
minor version bump
add test-kitchen
include self in Cheffile
add test-kitchen to chefignore