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.
now use os module to make specification of the lytaf_dir a bit more flexible.
improvements to test_lyra_utils. Now using os module to make lytaf_dir path specification flexible.
included additional value checks in test_lyra_utils
Merge pull request #676 from aringlis/lyra

Added test routine for LYRA instrument utilities and added an additional utility