Update Readme.md

Add grunt-contrib-imagemin in Grunt Plugins.
Merge pull request #27 from guilouro/master

Added Python Library of SVG
Merge pull request #25 from LFeh/master

Add grunt-contrib-imagemin in Grunt Plugins.
Add Concepts: Smarter Sketching
Merge pull request #28 from tophatch/master

Add Concepts: Smarter Sketching
Add grunt-svgstore link
Update contributing.md
Merge pull request #1 from willianjusten/master

merge in new changes from origin
Added pan/zoom libs
Merge pull request #29 from ariutta/master

Added pan/zoom libs
Add Highcharts link
Update Todd Parker Slides
Add Injecting SVG with JS
Add animating svg with clipping masks and css
SVG and icon-fonts the future of iconography
Add more links
Add link to download icon pack
c3 js added
Merge pull request #32 from umutc1/master

c3 D3-based reusable chart library
Added SVG Sprites Slides to Slides Section