bug fix: need to provide document ID in call to fetch()
bug fix: updated the replication event name
initial commit of migration sample
updated the Alloy sync adapter to support migrations
added gitignore file
added non-standard method Database.createSlowQuery() as this will be useful for migrations
updated docs to add createSlowQuery() function
added second migration to example app; tested down migration.
Merge branch 'feature/migrations' into develop