initial commit of shard controller
add_shard method
keys and strings can now be wrapped in ''
shard_collection
bugfixes
confirm mongos connection
changing to_str to mimic json
beginnings of status()
a few additions to status()
Merge branch 'master' of https://github.com/10gen-interns/mongo-rust-driver-prototype into sharding

Conflicts:
	src/libbson/json_parse.rs
Merge branch 'master' of https://github.com/10gen-interns/mongo-rust-driver-prototype into sharding
remove shard tag
Merge branch 'master' of https://github.com/10gen-interns/mongo-rust-driver-prototype into sharding
list shards
version checking
more intuitive ToStr for Document
shard tests
scripts for auto-running sharding tests
Merge branch 'master' of https://github.com/10gen-interns/mongo-rust-driver-prototype into sharding
gitignore