Added detection for Leaflet JS library
Added version report for Polymer
Added Pixi JS detection
Add Greensock JS detection
# This is a combination of 6 commits.
# The first commit's message is:
Update README.md

# This is the 2nd commit message:

add ifvisible to readme

# This is the 3rd commit message:

add ifvisible.js detection

# This is the 4th commit message:

Fixed issue where library icons appear cut-off

# This is the 5th commit message:

Removed outline box applied on first library name

# This is the 6th commit message:

dc.js detection
Merge pull request #43 from tancnle/leafletjs-detection

Added detection for Leaflet JS library
Merge pull request #44 from tancnle/polymer-version-detection

Added version report for Polymer
Merge branch 'greensock-detect' of https://github.com/heartcode/Library-Detector-for-Chrome into heartcode-greensock-detect
Merge branch 'heartcode-greensock-detect'
Merge branch 'pixi-detect' of https://github.com/heartcode/Library-Detector-for-Chrome into heartcode-pixi-detect
Update README
Remove changelog

(use GitHub repo :trollface:)