Option to enable db_cache:

- Now you can have sessions on cache (memcached) but avoid using
cache in boss_db
Updated api-config doc-src with the new option
Merge pull request #167 from jgordor/master

Option to enable/disable boss_db cache
db_cache_enable: slight fix-up
db_cache_enable: another stylistic tweak
New "_vars" template variable contains all vars
Update skel/boss.config
Merge pull request #170 from kotedo/patch-2

Update skel/boss.config
fix crash unknow websocket services
Merge pull request #177 from mihawk/feature/fix_crash_unknow_websocket_service

fix crash unknow websocket services
Add port and tls settings to smtp config.
Update config docs with SMTP port and tls settings.
Merge pull request #179 from fdevibe/add_port_to_smtp_config

Add port to smtp config
Update ErlyDTL custom tags code & conventions
Merge branch 'master' of github.com:evanmiller/ChicagoBoss
Remove debug
Document case-insensitive matches
Allow .dtl template extension. Stubs for Jade
Update ErlyDTL (fix {% url %} tag)
Integrate jaderl