Update version 0.3.0 -> 0.3.1

Update version 0.2.0 -> 0.3.0

Update version 0.1.4 -> 0.2.0

Update version 0.1.3 -> 0.1.4

Update version 0.1.2 -> 0.1.3

New Features
------------
* Support `dimod>=0.8.0,<0.11.0`

Update version 0.1.1 -> 0.1.2

Changes
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* Updates introduction doc

Fixes
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* Doctest fails

Update version 0.1.0 -> 0.1.1

Fixes
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* 1-sat and 2-sat generators in the stitch function no longer use a deprecated dimod feature

Changes
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* Passes 2-sat generation to penaltymodel-lp rather than handling it in `stitch`

Fix version number

Update version 0.0.11 -> 0.0.12

New Features
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* Uses the new `penaltymodel-lp` library for penalty models without auxiliary variables.

Merge pull request #84 from m3ller/fix/update-penaltymodel-cache-version

Fix/update penaltymodel cache version