mauritiusdadd/python-specex: 0.6.3

Commits fix availability checks (Maurizio D'Addona) be96e7d: Fix a bug in specex-plot that caused erroneus cutout plotting (Maurizio D'Addona) 245f546: Add a function for line identification (Maurizio D'Addona) e844c86: Add a function for redshift estimation from emission lines (Maurizio D'Addona) 51c37cf: Add two new CIII lines (Maurizio D'Addona) 56216a0: Update redrock installation script to redrock 0.15.4 (Maurizio D'Addona) eeefd6b: Version 0.6.3 (Maurizio D'Addona