Features & Fixes

• Tests added for query builders in b0b0ad3, f09b3b1, 21c8425 which brings test coverage to 98%
• Abstraction added for fetching upcoming/past launches from a single function e75731e. (Rafael Ramalho)
• Added querystring option to show unique mongo document id's 93610a5
• Added querystring option to filter launches and cores by block number ddd24c7
• Added querystring option to pretty print JSON output for debugging 188cf22
• Added jsdoc for builders and helper functions 3a5d25d