Modified ISC Pool Calculator

Now takes a hash its data parameter instead of a file handle.
This is because molarities are now extracted at an earlier step
and can just be passed in here.

Pooling calculator EPP

Will fetch molarities from forked plate, then pass those
molarities plus a mapper object into the pool calculator.

Pooling calculator gets its mapping info from a process doc.

Pool calculator returns volumes to take from each well
for a destination well.

The intention is that this will be used by any robot driver
generators or worksheet generators.
Removed unecessary flag.

Plan is to eventually move this away from epp namespace.
Can not do this right now as some of it will need to be
refactored into an unfinished module
Fixed broken tests
Merge pull request #195 from jbeast/pooling_calculator

Modified ISC Pool Calculator