Refactor global status check()

[palazzem]

Overview

This PR is a major refactoring that removes beautifulsoup4 in favor of (undocumented) Elmo's API. This is considered a breaking change because it alters the output of client.check(). Main changes are:

• /api/strings endpoint is used instead of scraping a page. That removes parser.py and response_helper.py modules
• Remove beautifulsoup4 dependency
• Rename areas into sectors.
• Breaking change: check() returns a dictionary with different keys

  
  # Before
  {
  "areas_armed": [{"id": 0, "name": "Entryway"}, ...],
  "areas_disarmed": [{"id": 1, "name": "Kitchen"}, ...],
  "inputs_alerted": [{"id": 0, "name": "Door"}, ...],
  "inputs_wait": [{"id": 1, "name": "Window"}, ...],
  }

After

{ "sectors_armed": [{"id": 0, "name": "Entryway", "element": 1, "index": 0}, ...], "sectors_disarmed": [{"id": 1, "name": "Kitchen", "element": 2, "index": 1}, ...], "inputs_alerted": [{"id": 0, "name": "Door", "element": 3, "index": 0}, ...], "inputs_wait": [{"id": 1, "name": "Window", "element": 4, "index": 1}, ...], }

* Add `client._query(query)` that queries Elmo System to retrieve entries (sectors or inputs). The query method is generic, and must be used via `elmo.query` module
* Sectors and inputs descriptions are cached using the `client._get_descriptions`

[codecov-io]

Codecov Report

Merging #48 into master will not change coverage by %. The diff coverage is 100.00%.

@@            Coverage Diff            @@
##            master       #48   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           10         9    -1     
  Lines          229       236    +7     
=========================================
+ Hits           229       236    +7     

Impacted Files	Coverage Δ
elmo/api/client.py	100.00% <100.00%> (ø)
elmo/api/exceptions.py	100.00% <100.00%> (ø)
elmo/api/router.py	100.00% <100.00%> (ø)
elmo/query.py	100.00% <100.00%> (ø)

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