Rename Install Target idom[stable] to idom[any] #600

Current Situation

The idom[stable] install target makes it seem like this is a "stable" release of IDOM rather than a "stable" server implementation. At the moment though, our tests are good enough to guarantee that all supplied server implementations work correctly.

Proposed Actions

We should rename the install target to idom[any] in order to better imply that you don't care what implementation you're using.

Work Items

• rename install target to idom[any] and update docs
• make idom[stable] an alias for [any]
• add issue to remove idom[stable] install target after 1.0