#161966623: add reading time estimation

[TeamoreA]

What does this pull request do?

This PR estimates the reading time of an article.

Description of the tasks to be completed?

• Gets the article and estimates the reading time using average human reading speed in words per minute.

How should this be manually tested?

   $ git clone https://github.com/andela/ah-technocrats.git
   $ cd ah-technocrats
   $ git checkout ft-read-time-161966623
   $ virtualenv -p python3 env
   $ source env/bin/activate
   $ pip install -r requirements.txt
   $ python manage.py makemigrations
   $ python manage.py migrate
   $ python manage.py runserver

testing:
$ ./manage.py test

Screenshots:

Show the time taken to read an article

What are the relevant Pivotal Tracker Stories

#161966623

Checklist:

• My code follows the style guidelines of this project
• At least 2 people have reviewed my PR
• I have commented my code, particularly in hard-to-understand areas
• My changes generate no new warnings
• New and existing unit tests pass locally with my changes
• My PR has one commit.

[salma-nyagaka]

The reading time is okey

[actlikewill]

Good and simple implementation. It looks okay.

[SnyderMbishai]

Looks good. Please solve the current conflicts.

[codeclimate]

Code Climate has analyzed commit 96c1269 and detected 0 issues on this pull request.

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[verenceLola]

LGTM