feat: Add support for loading images with blob urls

[meetmangukiya]

Register blob as scheme instead of blob:http or blob:https because cornerstone-core splits on : and uses the first part as the scheme. So, if provided a url blob:https://github.com/test-id it will consider blob as the scheme instead of blob:https.

Closes https://github.com/cornerstonejs/cornerstoneWebImageLoader/issues/13

[coveralls]

Coverage decreased (-0.07%) to 5.263% when pulling ff48ce55193611d501fd22dcb19725b55804fd94 on flamy-dev:blobs into fd929932fe04231e42b7d3afd271d20832e22e09 on cornerstonejs:master.

[meetmangukiya]

Not sure how the coverage got decreased since we are just importing the whole module for giving an illusion of coverage(I think)?

Also, can we have a release after this is merged @chafey(mentioning for notification since no new commit in last 6 months and you are mentioned as package author) ?

[meetmangukiya]

In the meanwhile if anyone wishes to use this I've published it to github package - https://github.com/flamy-dev/cornerstoneWebImageLoader/packages/297934

[Inzeppelin]

This change would be extremely useful. Thanks @meetmangukiya @coveralls It's quite obvious that this PR can't affect your tests.

What do expect me to do in order to help with merging this one?

[meetmangukiya]

@Inzeppelin don't think this is going to be merged, better fork