Overhaul steve to use click

* rewrote steve to use click for subcommand structure, help text,
  argument parsing and output
* redid entry points so that if steve throws an exception, it yields
  a helpful text for writing up an issue
* added initial command line tests

Two big reasons to switch to click are:

1. the structure for subcommands, options and arguments is a lot easier
   to put together, read and understand than what we had before
2. it's way easier to test command line handlers and we should be doing
   that more

Fixes #32

Author: willkg

docs/commandline.rst

@@ -167,7 +167,7 @@ Example use
 
       For example, if you use vim::
 
-          steve-cmd status --list | xargs vim
+          steve-cmd status --aslist | xargs vim
 
       and edit them by hand one-by-one.
 

docs/installation.rst

@@ -42,7 +42,7 @@ git clone and installing from that:
 
     1. ``git clone git://github.com/pyvideo/steve.git``
     2. ``cd steve``
-    3. ``python setup.py develop``
+    3. ``pip install -r requirements.txt``
 
     Update like this:
 
@@ -60,7 +60,7 @@ do this:
 1. ``git clone git://github.com/pyvideo/steve.git``
 2. ``cd steve``
 3. ``virtualenv ./venv/``
-4. ``./venv/bin/python setup.py develop``
+4. ``./venv/bin/pip install -r requirements.txt``
 
 When you want to use steve from your virtual environment, make sure to
 activate the virtual environment first. e.g.:

requirements.txt

@@ -1,10 +1,8 @@
 -e .
 
+# Development requirements
 Sphinx
-argparse
-blessings
-html2text
-requests
+click
 flake8
 pytest
 tox

scripts/steve-cmd

@@ -6,9 +6,9 @@
 # license.
 #######################################################################
 
-from setuptools import setup, find_packages
-import re
+from setuptools import find_packages, setup
 import os
+import re
 
 
 READMEFILE = 'README.rst'
@@ -39,16 +39,19 @@ def get_version():
     zip_safe=True,
     packages=find_packages(),
     include_package_data=True,
-    scripts=['scripts/steve-cmd'],
     install_requires=[
-        'argparse',
-        'blessings',
+        'click',
         'html2text',
         'jinja2',
         'requests',
         'pytest',
+        'tabulate',
         'youtube-dl',
-        ],
+    ],
+    entry_points="""
+        [console_scripts]
+        steve-cmd=steve.cmdline:click_run
+    """,
     classifiers=[
         'Development Status :: 5 - Production/Stable',
         'Environment :: Console',