Pyppium

This patch contains:

**`tests`** - Add unity tests for browserstack and log module.
**`browserstack`** - Add a rest interface request to the browserstack.
**`log`** - Add log decorator for browserstack responses.
**`docs`** - Update docs for pyppium driver and browserstack.
**`driver`** - Update pyppium driver to use environment variables BROWSERSTACK_USERNAME and BROWSERSTACK_ACCESS_KEY

This patch contains:

**`tests`** - Add unity tests for new waits conditions.
**`conditions`** - Add a condition to wait for an element to be clickable.
**`conditions`** - Add a condition to wait for an element to be invisible.

This patch contains:

**`tests`** - Refactor to tests e2e.
**`docs typos fixes`** - A big review of all documentation typos errors.
**`docs style`** - Changing the main color and add a repository icon.
**`docs pyppium driver`** - Add detailed content to the pyppium driver documentation.
**`docs fetcher`** - Add detailed content to the fecther module.
**`docs decorators`** - Add detailed content to the decorator's module.
**`docs settings`** - Add detailed content to the settings module.

This release contains :

**`setting module`** - To override global configurations with a yaml.
**`docs hosting`** - Change hosting to use GitHub Pages.
**`docs style`** - Add material style.
**`docs quickstart`** - Add content to the quickstart with pyppium.
**`docs installation`** - Add content to the installation.

This release contains :

**`update badge codecov`** - Set the new codecov project repo.
**`fetcher module`** - To fetch one or many elements by platform.
**`driver module`** - To control the driver abstraction.
**`condition module`** - To control conditions statements.
**`helper module`** - With some abstraction to elements interactions.
**`decorators module`** - To change the tests flow.
**`tests`** - For unity and integration tests.
**`docs`** - With detailed documentation about pyppium.