Optional linkText serviceProps

Merge pull request #4 from perfectsense/feature/linkText

Adding optional linkText to each share icon

Service providers can now override certain parent `data-attr` options...

Currently this update supports overriding the following fields:

• title
• caption
• description

Add lines of code to handle Tumblr

3.0.2

bump to 3.0.2

Added Public API to share a specific service

2.0.1

Added Public API to share a specific service and attached the instanc…

Updated bsp-share to newer bsp-plugin pattern using Object.create

Merge pull request #2 from perfectsense/bsp-share-2.0

Bsp share 2.0