KAZOO-866: updated skel app files with formatting, headers, etc
KAZOO-1093: added the 'omnipresence' app for tracking presence
KAZOO-1093: generic ETS table manager
KAZOO-1093: omnipresence subscription manager
KAZOO-1093: log the stacktrace properly
KAZOO-1093: start to handle subscription requests
KAZOO-1093: update formatting, tickies
KAZOO-1093: update tickies, formatting
KAZOO-1093: wapi module to handle kamailio presence-related APIs
KAZOO-1092: even more generic ETS table manager
KAZOO-1092: update startup and usage of ETS manager
KAZOO-1092: fix exchange type
KAZOO-1092: update listener for subscriptions, and expire old subs
KAZOO-1092: set log id
KAZOO-1092: listen for presence updates and channel events
KAZOO-1092: formating
KAZOO-1092: add channel_answer event to new/destroy, and set the to, from, and request in the destroy event
KAZOO-1092: always try to shutdown the pinger when removing a node
KAZOO-1092: bind for new, answer, and destroy
KAZOO-1092: handle new/answer/destroy call events for updating subs