- Drop patches merged in the git repo:
* xli-1.17.0-8bit_palette.patch
* xli-1.17.0-configfile.patch
* xli-1.17.0-overflow.patch
* xli-1.17.0.patch
* xli-png-alpha.patch
* xli-png_check_sig.patch
- Update to version 1.17+git20170726.0bb4fb4:
* Respect destdir during install
* Symlink with relative path in makefile
* Add support for 8bit pallete
* Make xli handle arrow keys to move image
* Add temp files and patches to gitignore
* Implement zoom functionality
* Adds support for the special "None" colour in XPMs
* Document zooming control
* Add a -forall option
* A bug with all merging
* Do not read past buffer end

- Allow xli to load up on alpha backgrounded png, if there would be
upstream this should be upstreamed:
* xli-png-alpha.patch
- Cleanup a bit with spec-cleaner