boneIO v0.3.0dev3

Changelog:

• timeperiod support - no more 60 as seconds. Now you type 60s, 60secs, 60ms, 60minutes etc.!
• support for: !include_dir_list, !include_dir_merge_list, !include_dir_named, !include_dir_merge_named
• support for secrets.yaml
• momentary switch momentary_turn_on, momentary_turn_off
• set gpio mode via python code directly
• fix relay actions to be on, off again
• resend online state on mqtt connection reset