Add Python 3 compatibility (#109)

* Add python3 compat

* Update .gitignore

* Update .gitignore again

* Remove debugging return

* Add unicode_literals import

* Bump version

* Add python3-tk note

docs/index.rst

@@ -55,13 +55,7 @@ Release v\ |version|. (:ref:`Installation <install>`)
 
 There's a :ref:`command-line interface <cli>` too!
 
-.. note:: Camelot only works with:
-
-          - Python 2, with **Python 3** support `on the way`_.
-          - Text-based PDFs and not scanned documents. If you can click-and-drag to select text in your table in a PDF viewer, then your PDF is text-based. Support for image-based PDFs using **OCR** is `planned`_.
-
-.. _on the way: https://github.com/socialcopsdev/camelot/issues/81
-.. _planned: https://github.com/socialcopsdev/camelot/issues/101
+.. note:: Camelot only works with text-based PDFs and not scanned documents. If you can click-and-drag to select text in your table in a PDF viewer, then your PDF is text-based.
 
 Why Camelot?
 ------------

docs/user/install.rst

@@ -14,6 +14,8 @@ For Ubuntu::
 
     $ apt install python-tk ghostscript
 
+.. note:: For Python 3, install python3-tk.
+
 For macOS::
 
     $ brew install tcl-tk ghostscript