Added support for Tunisian Dinar

[rochdi80tn]

Fixes # by...

Changes proposed in this pull request:

• Added support to Tunisian Dinars currency amount to letters for arabic language
  So someone can use this syntax to get proper tunisinan currency amount in words.
  amount_in_words = num2words(amount, lang='ar', to='currency', currency='TND')

Status

• READY
• HOLD
• [] WIP (Work-In-Progress)

How to verify this change

use the above stated example

[rochdi80tn]

Hello,
Who can review and approve this PR please ?

[coveralls]

coverage: 98.052% (+0.001%) from 98.051%
when pulling 774576c on rochdi80tn:master
into 0df2a0e on savoirfairelinux:master.

[mrodriguezg1991]

Hello, Who can review and approve this PR please ?

Helloo
Thanks for contributing to the project
The change seems ok, however because you added new lines the test coverage decreased, please add new tests to validate the changes

[rochdi80tn]

Hi @mrodriguezg1991,
Tests updated to fix coverage.

[rochdi80tn]

Hello
I need this PR change in a production system. Do you know when this could be merged and released? Is there a schedule for releases ?
Thank you.
BR
Rochdi