Update changelog

[iGitScor]

Hi,

We have to update the changelog.
For that, we need to see changes between 1.2 and 1.2.5

After that, we'll be able to publish the new version to npm and improve the project

Thank you

[kmulligan]

I come from Your First PR on Twitter.

3 things:

1. Would be glad to keep my first PR to help out with this, but going to need guidance. Do you mean just updating CHANGELOG.md? How would I know what's changed between 1.2 and 1.2.5?

2. I noticed a typo in the js files in /lib/. Kickstarter is misspelled. Seems like a simple enough fix for a first PR as well?:

 * This file is part of the Kickstarter.
 *
 * **(c) iGitScor <http://github.com/iGitScor/kicksterter>**
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 *

3. Maybe add something in the README.md to explain what the kickstarter does? It seems unclear to me at first reading. But that's probably because I'm a newb :)

[iGitScor]

Hi @kmulligan,

sorry for the response delay
Welcome !

The task is to have a complete changelog, but unfortunately it's not up to date
You can make any improvement you mentioned above

Thank you