Strengthen parsee's skill
Kaguya: implemented wrong, fix
incr ver, welcome msg.
Undo refactoring
THB: Distance subsystem refactoring
Merge remote-tracking branch 'zhyk/parsee' into hotfix
Parsee implementation tune, and some code cleaning.
incr ver, welcome msg.
Endpoint: Explicit heartbeat.
Skill box minor bug fix, code cleaning.

* Skill box button sometimes light when shouldn't, fix.
services.events: Add rabbitmq heartbeat
service.events: No heartbeat for sending connection
Explicit heartbeat: code tune.
 FIXUP: Explicit heartbeat: code tune.
incr ver, welcome msg.
Parsee: crash on recycling skill card, fix
incr ver, welcome msg.
user_input mechanism refactoring.
Balance tune & bug fix

* Marisa, Kogasa, Meirin: their skill effect can choose card now
* Meirin: LoongPunch tune
* SaigyouBranch: can't respond Reject now.
* FlirtingSword: ui_meta can't choose equips now
UserAction: do not be invalid when src or tgt dead.

* Before fix, this interrupts AOE when source dead in progress.