Disabled Python 3.7-dev build in Travis CI

There are a couple unit test failures with Python 3.7-dev that we will need to look into at some point, so I disabled that build for now.

Updated all documentation to reflect that cmd2 is support on Python 2.7 and 3.4+.
Official support for Python 3.3 has been abandoned due to no longer having support to test on that platform on Travis CI.

Author: tleonhardt

.travis.yml

@@ -16,9 +16,9 @@ matrix:
         - os: linux
           python: 3.6
           env: TOXENV=py36
-        - os: linux
-          python: 3.7-dev
-          env: TOXENV=py37
+#        - os: linux
+#          python: 3.7-dev
+#          env: TOXENV=py37
 #        # Warning: Don't try to use code coverage analysis with pypy as it is insanely slow
 #        - os: linux
 #          python: pypy

CHANGELOG.md

@@ -5,6 +5,8 @@
 * Enhancements
     * Improved documentation for modifying shortcuts (command aliases)
     * Made ``pyreadline`` a dependency on Windows to ensure tab-completion works
+* Other changes
+    * Abandoned official support for Python 3.3.  It should still work, just don't have an easy way to test it anymore.
 
 ## 0.7.8 (November 8, 2017)
 

CONTRIBUTING.md

@@ -44,10 +44,10 @@ The tables below list all prerequisites along with the minimum required version
 
 | Prerequisite                                        | Minimum Version |
 | --------------------------------------------------- | --------------- |
-| [Python](https://www.python.org/downloads/)         | `3.3 or 2.7`    |
+| [Python](https://www.python.org/downloads/)         | `3.4 or 2.7`    |
 | [six](https://pypi.python.org/pypi/six)             | `1.8`           |
 | [pyparsing](http://pyparsing.wikispaces.com)        | `2.0.3`         |
-| [pyperclip](https://github.com/asweigart/pyperclip) | `1.5`           |
+| [pyperclip](https://github.com/asweigart/pyperclip) | `1.6`           |
 
 #### Additional prerequisites to run cmd2 unit tests
 

README.md

@@ -32,7 +32,7 @@ Main Features
 - Parsing commands with flags
 - Unicode character support (*Python 3 only*)
 - Good tab-completion of commands, file system paths, and shell commands
-- Python 2.7 and 3.3+ support
+- Python 2.7 and 3.4+ support
 - Linux, macOS and Windows support
 - Trivial to provide built-in help for all commands
 - Built-in regression testing framework for your applications (transcript-based testing)
@@ -46,7 +46,7 @@ On all operating systems, the latest stable version of `cmd2` can be installed u
 pip install -U cmd2
 ```
 
-cmd2 works with Python 2.7 and Python 3.3+ on Windows, macOS, and Linux. It is pure Python code with
+cmd2 works with Python 2.7 and Python 3.4+ on Windows, macOS, and Linux. It is pure Python code with
 the only 3rd-party dependencies being on [six](https://pypi.python.org/pypi/six),
 [pyparsing](http://pyparsing.wikispaces.com), and [pyperclip](https://github.com/asweigart/pyperclip) 
 (on Windows, [pyreadline](https://pypi.python.org/pypi/pyreadline) is an additional dependency).

docs/index.rst

@@ -72,7 +72,7 @@ Contents:
 Compatibility
 =============
 
-Tested and working with Python 2.7 and 3.3+.
+Tested and working with Python 2.7 and 3.4+.
 
 Indices and tables
 ==================

docs/install.rst

@@ -7,7 +7,7 @@ This section covers the basics of how to install, upgrade, and uninstall ``cmd2`
 
 Installing
 ----------
-First you need to make sure you have Python 2.7 or Python 3.3+, pip_, and setuptools_.  Then you can just use pip to
+First you need to make sure you have Python 2.7 or Python 3.4+, pip_, and setuptools_.  Then you can just use pip to
 install from PyPI_.
 
 .. _pip: https://pypi.python.org/pypi/pip

setup.py

@@ -32,7 +32,7 @@
     - Parsing commands with flags
     - Unicode character support (*Python 3 only*)
     - Good tab-completion of commands, file system paths, and shell commands
-    - Python 2.7 and 3.3+ support
+    - Python 2.7 and 3.4+ support
     - Linux, macOS and Windows support
     - Trivial to provide built-in help for all commands
     - Built-in regression testing framework for your applications (transcript-based testing)