First attempt at adding some support for IRIS

This is a pretty basic attempt, it adds a function that converts a
SJI cube into a MapCube, by replicating the header.

Also added a 'blank' map source for this type of image.
Add IRIS to map sources __init__
Change class doc string!
Add IRIS to changelog
updated version number and default import

Now default import includes system_info as well as test
Change hdu[0] to hdu for optional indexing
Merge pull request #8 from CyclingNinja/iris

Change hdu[0] to hdu for optional indexing
Modify GenericMap.rotate to allow rmatrix as argument.

Allow rotate() to accept either angle or a linear transform rotation
matrix. This is to facilitate WCS pci_j matirx rotation.
Add method to align IRISMap by rotation from header
Merge pull request #9 from CyclingNinja/iris

Iris
added a split_series function to the instr/lyra module, which will split up a timeseries based on the results of a LYTAF query.
added needed modules to lyra.py
added a subset of the LYTAF database to data/test/ for testing purposes
added tests for lyra utilities.
removed unnecessary print statement
edits to lyra utility tests.
typo bug fix to tests/instr/test_lyra.py
changed download method to urllib.retrieve so that terminal is blocked during LYTAF download.
small fixes to LYRA utils tests.
removed unneeded database file.