improving Contributing guide

[dans77777]

I saw some good description related to the issues and pull request is missing . I will try to improve this .

[c-rindi]

Thank you, @dans77777. Can you please give some more details as to the improvements to be made?

[dans77777]

@c-rindi This is the screenshot of contribute.md file. here under contributing guide point I wanted to add one line description for developers about gh-pages branch and link to the same and also link for understanding the workflow of the project. bcz I know when I was new to this project during MLH journey , there was no way for me to know about gh-pages branch to work with website . also I wanted to change some sentence structure like they have given "send us a pull request" , raising a pull request is most appropriate according to the standard. these minor things surely makes high quality docs and really useful .

I hope this is clear to you. Thank you

[dave-gantenbein]

Hey team! Please add your planning poker estimate with ZenHub @dejanzele @jayofdoom @kannon92 @richscott

[kindyluv]

Hi @dans77777 Please have you worked on this? and if no I want to work on it what do I need to know.

[dans77777]

@kindyluv heyy, I already have a PR on this. can you please start with #1144 ? Thank you.