Libungif 4.1.3

libungif is a library for reading and writing gif images.
The save functionality uses an uncompressed gif algorithm to avoid the Unisys LZW patent. giflib is an API and ABI compatible replacement for use in countries where LZW is not patented.
Installation:
1. `cd to the directory containing the packages source code and type `./configure to configure the package for your system. If youre using `csh on an old version of System V, you might need to type `sh ./configure instead to prevent `csh from trying to execute
`configure itself.
Running `configure takes awhile. While running, it prints some messages telling which features it is checking for.
2. Type `make to compile the package.
3. Optionally, type `make check to run any self-tests that come with the package.
4. Type `make install to install the programs and any data files and documentation.
5. You can remove the program binaries and object files from the source code directory by typing `make clean.
To also remove the files that `configure created (so you can compile the package for a different kind of computer), type `make distclean. There is also a `make maintainer-clean target, but that is intended mainly for the packages developers.
If you use it, you may have to get all sorts of other programs in order to regenerate files that came with the distribution.
Enhancements:
- test-unx: Add a test of extension code.
- lib/egif_lib.c: Remove a debugging statement
- Makefile.am, doc/Makefile.am, pic/Makefile.am: Change wildcarded entries into explicit filenames so make distcheck will succeed.
- ChangeLog, prop=lastlog: Sync the ChangeLog for the release.
- windows: The windows subdirectory and all files under it are contributions from Lennie Araki to provide a nice interface on MS Windows.
- README: Redundancy fix.
- doc/gif_lib.html: Add EGifPutExtension{First,Next,Last} to the documentation so people know they should use it instead of EGifPutExtension.
- Makefile.am: Mark the windows files to be distributed.
- NEWS: Complete the NEWS item for 4.1.3.