Deletes old vela fermi analysis files from the repo
Adds data files for the Fermi Vela Region - background, counts, events, exposure, livetime, psf, background+source
Adds cutout for vela region of gll_iem_v05_rev1.fit Fermi Diffuse background model
Adds xml background models used with gtmodel to produce npred images total_vela.fits and background_vela.fits
Adds shell script including all fermi tool commands used to create data files
Adds explanatory README.rst file for Fermi Vela Region folder
Merge pull request #6 from ellisowen/vela_corrections

Vela corrections