Ignores virtual environment files, adds twisted to requirements.txt

.gitignore

@@ -4,3 +4,4 @@ pycomm.log
 sails/.tmp
 .remote-sync.json
 database.db
+venv/

requirements.txt

@@ -1,11 +1,13 @@
 cffi==1.9.1
 click==6.6
+constantly==15.1.0
 cryptography==1.5.3
 enum34==1.1.6
 Flask==0.11.1
 Flask-Restless==0.17.0
 Flask-SQLAlchemy==2.1
 idna==2.1
+incremental==16.10.1
 ipaddress==1.0.17
 itsdangerous==0.24
 Jinja2==2.8
@@ -19,4 +21,6 @@ python-mimeparse==1.6.0
 requests==2.12.1
 six==1.10.0
 SQLAlchemy==1.1.4
+Twisted==16.6.0
 Werkzeug==0.11.11
+zope.interface==4.3.2