add use_torsocks role variable

[david415]

This role variable should case the role to use torsocks (usewithtor) whenever possible to install things; for example:

usewithtor apt-get install PackageName
or
usewithtor pip install PythonPackageName

If use_torsocks is set to "no" then the appropriate ansible module should be used to install the package...

Perhaps use_torsocks should have a default value of "yes" set in the defaults section of the role.

[leewoboo]

for instance, the task to pip install obfsproxy with usewithtor would be:

• name: ensure obfsproxy is pip installed in our python virtual env when use_torsocks
  shell: "usewithtor pip install {{ tor_obfsproxy_git_url }}"
  environment:
  PIP_DOWNLOAD_CACHE: "{{ tor_obfsproxy_home }}/.pip_download_cache"
  VIRTUAL_ENV: "{{ tor_obfsproxy_home }}/{{ tor_obfsproxy_virtenv }}"
  PATH: "{{ tor_obfsproxy_home }}/{{ tor_obfsproxy_virtenv }}/bin:{{ ansible_env.PATH }}"
  when: use_torsocks is defined and use_torsocks