Add-Functionality

Hi @stefanstranger,

**Split-Tweet:**
a. now splits tweets at word boundaries;
b. postfix param removed. postfix will be added automatically.

**Get-ShortURL:** Newly created, get a short tiny url.

I am git n00b as well. So, had to delete the repo, refork and add a new branch for merge. Phew! looks like it will merge without issues now :+1: 

Please check the code and let me know if the code can be merged or let me know if you need more details.

Regards,
SqlChow.