exception modules should be renamed

[wasade]

...or, we should develop some support to allow for importing of builtin modules with the same name. Details can be found here. As present, you cannot do:

import exceptions
try:
    foo.decode('ascii')
except exceptions.UnicodeDecodeError
   pass

As exceptions refers to the module in the package directory.

[antgonza]

@wasade checking the code, I saw that we either do: from .exceptions ... or from qiita_[folder].exceptions ..., which do not overlap with from exceptions ..., does this suffice?

[wasade]

The namespace resolution is critical, and the semantic resolution is important