With rvm the require 'tf/Tensorflow' should consider GEM_HOME
With rvm the require 'tf/Tensorflow' should consider GEM_HOME

If rvm is used to install ruby-tensorflow, then it's location
is not in global search path thus we need to require the
Tensorflow.bundle using a path based on GEM_HOME.

somaticio/tensorflow.rb,chrhansen/tensorflow.rb,somaticio/tensorflow.rb,chrhansen/tensorflow.rb,somaticio/tensorflow.rb,somaticio/tensorflow.rb,somaticio/tensorflow.rb,chrhansen/tensorflow.rb,chrhansen/tensorflow.rb