Look for application-level Solr config items

+ search for application default solr config items between
  model specific and gem default.
+ track solrconfig, schema, and stopwords

Use a transient file to verify app. default schema

+ The application default schema used for testing is also used for
  migration, unlike the article schema it was modeled after. If this
  optional file is a permanent resident in this gem it must be kept
  up to date with the built in schema.
+ Instead of adding more data to synchronize, create it, inspect it,
  and destroy it during testing.
Bumping version to 1.2.9
Fix for doing batch processing regardless of primary key name
Increment version to 1.2.10
Fix for destroying records without key named 'key'
Increment version
Various fixes for new primary_key_name usage
New version
Fix more bugs related to keys as objects
New version number
Merge remote-tracking branch 'jason/master'