Change wget to curl.

In order to resolve SSL certificate verification issues
Remove python-pip package.

Various distributions offer older pip versions that do not support the
version parameter
Add missing "0"
Fix wrong path of sample configuration file.
Don't reference deck_hash if it was not supplied
Implement some better fixes to the none type error

Do not fail in downloading the inputs specified as URLs if a bouncer is not
specified.
Have some more sane defaults in the ooniprobe sample config
Remove debugging code.
URL must be utf-8
Write unittest for testing https://github.com/TheTorProject/ooni-backend/pull/16
Merge pull request #184 from TheTorProject/fix/url_must_be_utf8

URL must be utf-8
Merge pull request #186 from TheTorProject/fix/simplify_filterHelperAddresses

Write unittest for testing https://github.com/TheTorProject/ooni-backend...
Add a version and author to dnsspoof
Add encoding format
Merge pull request #188 from TheTorProject/fix/add_version_and_author_to_dnsspoof

Add a version and author to dnsspoof
Move all nettests from data/ directory to the ooni/nettests directory.
Add support for specifying nettests via their shorthand name.
Update documentation and test decks to use shorthand for tests.
Only lookup test decks if they have not already been specified.
Merge remote-tracking branch 'thetorproject/master' into feature/move_nettests

* thetorproject/master:
  Add encoding format
  Add a version and author to dnsspoof
  Write unittest for testing https://github.com/TheTorProject/ooni-backend/pull/16
  URL must be utf-8