initial import of common files

helper functions and the like
initial import of person model

definitions of Person object
also model common.go which has model helper functions

GitHub Issue #1
removed go-logging

for simplistic reasons
getting Person object from POST

next step is to save in Mongo

GitHub Issue #1
initial import of MongoDB handler
added logging for successful connection
added new db env vars
storing person in DB

GitHub Issue #1
added bson

required for binding
added db env var loading

added db connection
Merge branch 'feature/person_resource' into develop
added get Person by ID

GitHub Closes #2
added list persons function

Closes #3
added limit constant of for listing
added route for persons.list

Closes #3
Merge branch 'release/v0.1.0'