New primitives for adam-core

[devin-petersohn]

Here is a link to the list of primitives we would need in a Bedtools implementation:

http://bedtools.readthedocs.io/en/latest/content/overview.html#summary-of-available-tools

Which primitives would be useful in ADAM?

[heuermh]

Bedtools intersect, closest, and merge are those operations I use most frequently.

[devin-petersohn]

For now, we will add things to the layer above ADAM, and we will merge primitives into ADAM as we have them tested.

[heuermh]

Sounds reasonable.