Fixed memory leak and updated PSF fitting.

EXOTIC no longer fails when large FITS files or a large number of FITS files are loaded.

PSF fitting updated to no longer fail on some datasets.

v0.11.1 - bugfix for PSF fitting
v0.11.2 - more PSF fitting bug fixing
v0.11.3 - bugfix for those who do not want to plate solve

New image file extensions, more WCS functionality, updated plot colors, candidate planet option fixed, more robust path checking, and general code cleanup.

Features:
User can now enter in their file extensions, as long as it is a derivative of .fits.
Plate Solution file now will have every pixel converted to WCS for checking of variable stars and later target stars
Fixed plot colors so that labels/edges are in black rather than in grey
Enabled candidate planets (not in Exoplanet Archive) to be reduced
Bugs:
Candidate planet option fixed
Save directory path fixed as well as other directory and file paths
Code clean up and fixed some Python formatting.
Safeguard for plate solution
Fix bug with directoryP being referenced before being assigned

Plate Solutions, pixel scale, instructions, final plot updates

Plate Solutions implemented
Pixel scale automatically calculated from plate solution
Searching planet names are now more robust
Code cleanup
More options for calculating limb darkening coefficients from EXOFAST
Updated instructions for installation and running the code
Updated final plots
Memory allocation increased to allow for loading of more FITS files

Initial release

First release of the EXOplanet Transit Interpretation Code.