rulus.bot.core: closure(this) -> this.settings
rulus.bot.core: start/callback/execute logic updated
  onStepSuccess/onStepError/onComplete methods added
rulus.bot.core: exception method updated
rulus.bot.core: restructured
Merge remote-tracking branch 'origin/master' into rulus.bot.core
rulus.bot.core: default log type = 'info'
Merge remote-tracking branch 'origin/master' into rulus.bot.core

Conflicts:
	src/rulus/bot/rulus.bot.dom.js
rulus.bot.core: stop bot on error
rulus.bot.core: eval keyString defined