Refactor trailing_stop

[todo]

this code is messy

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gdax_bot/inc/trailing_stop.rb

Lines 3 to 8 in 07c1265

	# @todo Refactor trailing_stop
	# @body this code is messy
	def trailing_stop(open_price, percent_of_portfolio, pair = 'LTC-BTC', profit = 0.5, t_stop = 0.25, stop_percent = 1.0, existing = false)
	File.delete('jobs/paused_ts.json') if check_for_paused_job('ts')
	redis = Redis.new

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This issue was generated by todo based on a @todo comment in 07c1265 when #66 was merged. cc @Skeyelab.