Minor bugfixes and improvements

Absorb changes introduced in mongo-c-driver 1.16

mongo.BSON(): autodetect between BSON/JSON data

New API for consistency with Mongo C Driver's API:

• collection:insertMany(document1, document2, ...)
• collection:insertOne(document, [options])
• collection:removeMany(query, [options])
• collection:removeOne(query, [options])
• collection:replaceOne(query, document, [options])
• collection:updateMany(query, document, [options])
• collection:updateOne(query, document, [options])

Minor fixes, tests & docs

Absorbed changes introduced in mongo-c-driver 1.13.0
Better type errors/checks
Minor fixes

Support for read preferences
Fix: query is mandatory in collection:count() and collection:remove()

Removed/renamed due to deprecation in mongo-c-driver 1.11:

• cursor:isAlive() -> cursor:more()
• collection:stats()
• collection:validate()

API updated to libmongoc 1.9.0

Minor fixes

First official release

API updated to libmongoc 1.7.0