Switch from using straight pip and virtualenv to pipenv

Need to write an INSTALL.md for this.

Pipfile

@@ -0,0 +1,30 @@
+[[source]]
+url = "https://pypi.org/simple"
+verify_ssl = true
+name = "pypi"
+
+[packages]
+"beautifulsoup4" = "==4.6.0"
+bleach = "==2.1.3"
+certifi = "==2017.11.5"
+chardet = "==3.0.4"
+decorator = "==4.1.2"
+django-markdownify = "==0.8.0"
+django-widget-tweaks = "==1.4.2"
+"html5lib" = "==1.0.1"
+idna = "==2.6"
+markdown = "==2.6.11"
+"mastodon.py" = "==1.2.1"
+python-dateutil = "==2.6.1"
+pytz = "==2017.3"
+requests = "==2.18.4"
+six = "==1.11.0"
+"urllib3" = "==1.22"
+webencodings = "==0.5.1"
+Django = "==2.0.4"
+django-html_sanitizer = "==0.1.5"
+
+[dev-packages]
+
+[requires]
+python_version = "3.6"

requirements.txt

@@ -1,19 +0,0 @@
-beautifulsoup4==4.6.0
-bleach==2.1.3
-certifi==2017.11.5
-chardet==3.0.4
-decorator==4.1.2
-Django==2.0.4
-django-html-sanitizer==0.1.5
-django-markdownify==0.8.0
-django-widget-tweaks==1.4.2
-html5lib==1.0.1
-idna==2.6
-Markdown==2.6.11
-Mastodon.py==1.2.1
-python-dateutil==2.6.1
-pytz==2017.3
-requests==2.18.4
-six==1.11.0
-urllib3==1.22
-webencodings==0.5.1