initial tags work

Fixes #35
Merge pull request #36 from CrackerJackMack/tags

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Module Refactor

* Moves modules from SoftLayer/CLI/*.py to SoftLayer/CLI/modules/*.py
* Moves code from SoftLayer/CLI/__init__.py to SoftLayer/CLI/core.py,
  SoftLayer/CLI/environment.py, SoftLayer/CLI/helpers.py
Merge branch 'module_refactor' of github.com:sudorandom/softlayer-api-python-client into module_refactor