Adding support for position relative containers

In this release, the script will be a lot more stable than before because of the addition of support for position relative containers

Fixing Calculation Issues

In this release, I fixed some big mistakes in the calculation. Now it should all be correctly calculated.

Fixing README error

Changing unpgk link to version 1.0.2 instead of 1.0,0

README.md improvements

Improvements on the README.md file

Initial Release

Initial Release of the follow-js script.