Add myself as maintainer, update doc location
Add myself as maintainer, update doc location

jparise/flask-sqlalchemy,svenstaro/flask-sqlalchemy,inetCatapult/flask-sqlalchemy,juokaz/flask-sqlalchemy,underdogio/flask-sqlalchemy,heejongahn/flask-sqlalchemy,rinlv/flask-sqlalchemy,lordakshaya/flask-sqlalchemy,underdogio/flask-sqlalchemy,juokaz/flask-sqlalchemy,justanr/flask-sqlalchemy,marrybird/flask-sqlalchemy,svenstaro/flask-sqlalchemy,immunda/flask-sqlalchemy,inetCatapult/flask-sqlalchemy,rinlv/flask-sqlalchemy,heejongahn/flask-sqlalchemy,immunda/flask-sqlalchemy,lordakshaya/flask-sqlalchemy,bcho/flask-sqlalchemy,nickw444/flask-sqlalchemy