Bugfix minor
Enable unit with indexeddb-shim on Safari

However, seems something makes it fail badly on all tests with
indexeddb-shim. Funny since it works perfectly with Opera,Chrome,Mozilla
and IE.
Minor optimizations for dexie algorithms

Optimizations for anyOf(), equalsIgnoreCase() and startsWithIgnoreCase()
by using IDBCursor.bound() in the collection. This saves the algorithms
from up to one unnescessary onsuccess call and never fetch the cursor
for the last item if it's not a match.