Add config.session.age in millaseconds. Default 0.
Merge pull request #98 from scollett/set_session_age

Add config.session.age in millaseconds. Default 0.
Fix missing comma for json sample config.
Merge pull request #99 from scollett/set_session_age

Fix missing comma for json sample config.
Stop defaults in env.js overriding config.json values
Merge pull request #100 from scollett/fix_defaults_override_custom

Stop defaults in env.js overriding config.json values
Merge branch 'master' into history_with_redis