Move poll-sip script into clearwater-infrastructure
Merge pull request #48 from Metaswitch/poll_sip

[Reviewer: Matt] Move poll-sip script into clearwater-infrastructure
Pass options through to apt-get install for clearwater-upgrade
Merge pull request #49 from Metaswitch/allow_force_upgrade

Pass options through to apt-get install for clearwater-upgrade
Change netcat options to have it wait a bit for a SIP response
Add -w2 option back, to cope with hanging TCP connections
Merge pull request #52 from Metaswitch/issue50

[Reviewer: Matt][From: Alex] Prevent monit from spuriously restarting sprout