update readme for multiple and single lines embed.
Typos fixed.
trying to remove html markup from javascript
Merge branch 'chore/update_readme' of github.com:kashif-umair/gist-embed into chore/update_readme
debugging
debugging
debugging
debugging
debugging
debugging
merged with master
Merge pull request #6 from kashif-umair/chore/update_readme

Chore/update readme
Merge branch 'master' of github.com:kashif-umair/gist-embed into develop