rename package to gplibrary to match repo name

[bqpd]

per convexengineering/solar@07d17d3#commitcomment-28826411

[1ozturkbe]

@bqpd I have created the branch libRename and changed all mentions of gpkitmodels to gplibrary, since it was really easy. This might make people upset though when their models start throwing errors. How does one deal with that?

[1ozturkbe]

@bqpd are we planning to implement this at any point, perhaps with a deprecation warning? It seems like low hanging fruit.

[1ozturkbe]

This also has to do with issue #142

[bqpd]

Let's do it! unfortunately there's not quite room for a deprecation warning. I think the following steps should do:

• change each repo's references to gpkitmodels to a reference to gplibrary
• update the Jenkins scripts
• run repo tests / model tests / etc. to make sure they run on jenkins.