v1.9.2

Bug fixes for new option --output-dir in xrf-maps

v1.9.1

Cleaned up warnings in clang.
Update gaussian tails calc, had bad parenthesis in erfc that caused issues.
General bug fixes.

v1.9

Revert tails calc back to original.
Changed simga from 2.96 to 3.58 for Si Detector

v1.8

Replaced mpfit with NLopt library for more consistent optimization fits.

v1.7

Changed default optimizer to mpfit. Changed default optimizer profiles to fit with tails.

v1.6

added --files all to process all files.

v1.5

Fixed compton calc typo.
Changed limits on SNIP_WIDTH and COMPTON_F_TAILs to limtied_lo_hi

v1.4

Fix 2 mpfit quitting early

v1.3

Fixed issue where mpfit would randomly give up early in fitting.

v1.2

Merge pull request #195 from aglowacki/master

Refactor snip