added test gems
added a Gaurdfile
setup spec_helper.rb
remove old Test::Unit files
updated the uglifier gem
added time separator to time field on workout form and added placeholder
added ie placeholder js files
setup test environment

* test-environment-setup:
  added ie placeholder js files
  added time separator to time field on workout form and added placeholder
  updated the uglifier gem
  remove old Test::Unit files
  setup spec_helper.rb
  added a Gaurdfile
  added test gems
added helper method to set value of time fields
set attribute to nil if values are blank when setting time attribute
modified time validation message and weight validation