Init project structure
Init controllers folder
Merge branch 'feature/init-project' into develop
Install mongoengine
Init Link model
Init requirements file for development
Add config_production.py to ignore files
Modify Link model
Create LinkValidater
Create controller helper
Init Link controller
Add some test required files
Add mongodb connection utils
Create base test case class
Create config_test.py for config.py template
Create test_runner.py for test runner
Write LinkValidater spec
Implement LinkValidater by spec
Fix bug in controller helper
Fix bug in models helper