Added build/mongodb directory, and mongodb functions

pScout build:
- Import function "build_mongodb" from build/mongodb/mongo

mongo:
- connects to server
- set up client
- Iterate through variants
- Create constant collection and variable collection
- Link collections through manual reference
Bumped version number
Merge branch 'release/mongo_init'
Merge branch 'master' of https://github.com/henrikstranneheim/pScout