Log Message:
Update to 0.6.49:

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0.6.49
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* Move warning check in ``get_cache_path`` to follow the directory creation
  to avoid errors when the cache path does not yet exist. Fixes the error
  reported in #375.

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0.6.48
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* Correct AttributeError in ``ResourceManager.get_cache_path`` introduced in
  0.6.46 (redo).

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0.6.47
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* Correct AttributeError in ``ResourceManager.get_cache_path`` introduced in
  0.6.46.