Lml

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**Updated**

. replace __import__ with importlib

**Removed**

. removed python 2 support

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**Updated**

. non class object can be a plugin too
. `20 <https://github.com/python-lml/lml/issues/20>`_: When a plugin was not
installed, it now calls raise_exception method

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**Updated**

. `11 <https://github.com/python-lml/lml/issues/11>`_: more test contents for
OpenSuse package validation

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**Updated**

. `9 <https://github.com/python-lml/lml/issues/9>`_: include tests, docs for
OpenSuse package validation

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**Fixed**

. `8 <https://github.com/python-lml/lml/issues/8>`_: get_primary_key will fail
when a module is loaded later
. deprecated old style plugin scanner: scan_plugins

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**Fixed**

. Revert the version 0.0.5 changes. Raise Import error and log the exception