[skip ci] Updated licenses and gitignores

options/license/IJG-short

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+The authors make NO WARRANTY or representation, either express or
+implied, with respect to this software, its quality, accuracy,
+merchantability, or fitness for a particular purpose.  This software is
+provided "AS IS", and you, its user, assume the entire risk as to its
+quality and accuracy.
+
+This software is copyright (C) 1991, 1992, Thomas G. Lane.  All Rights
+Reserved except as specified below.
+
+Permission is hereby granted to use, copy, modify, and distribute this
+software (or portions thereof) for any purpose, without fee, subject to
+these conditions:  
+
+(1) If any part of the source code for this software
+is distributed, then this README file must be included, with this
+copyright and no-warranty notice unaltered; and any additions,
+deletions, or changes to the original files must be clearly indicated
+in accompanying documentation.  
+
+(2) If only executable code is
+distributed, then the accompanying documentation must state that "this
+software is based in part on the work of the Independent JPEG Group".
+
+(3) Permission for use of this software is granted only if the user
+accepts full responsibility for any undesirable consequences; the
+authors accept NO LIABILITY for damages of any kind.
+
+Permission is NOT granted for the use of any IJG author's name or
+company name in advertising or publicity relating to this software or
+products derived from it.  This software may be referred to only as
+"the Independent JPEG Group's software".
+
+We specifically permit and encourage the use of this software as the
+basis of commercial products, provided that all warranty or liability
+claims are assumed by the product vendor.