Update template_tags.rst

Adding usage examples
Merge pull request #20 from LovShack/patch-1

Update template_tags.rst
Remove Silk icons; Fix #16.
Merge pull request #22 from jonfaustman/feature/wip-silk

Remove Silk Icons
Bump Fontawesome to v4.0.3; Fix #15.
Merge pull request #24 from jonfaustman/feature/wip-fontawesome

Bump Fontawesome to v4.0.3; Fix #15.
Bump TWBS to v3.0.3; Fix #19.
Merge pull request #25 from jonfaustman/feature/wip-twbs

Bump Twitter Bootstrap to v3.0.3; Fix #19.
Bump Modernizr to v2.7.1; Fix #21.
Update base template.
Merge pull request #26 from jonfaustman/feature/wip-modernizr

Bump Modernizr to v2.7.1; Fix #21.
Bump jquery.scrollTo to v1.4.7; Fix #18
Bump jquery.smooth-scroll to v1.4.13; Fix #18
Merge pull request #27 from jonfaustman/feature/wip-jquery.scrollTo

Bump jquery.scrollTo to v1.4.7; Fix #18
Merge conflict.
Merge pull request #28 from jonfaustman/feature/wip-jquery.smooth-scroll

Bump jquery.smooth-scroll to v1.4.13; Fix #18
Optional version for Modernizr.
Cleaner checking.
jQuery current version.
lang attr val default.