Instead of adding the zip files to git, this commit adds the unzipped content, and ensures that the Maven build generates the zip files. This way, editing is a lot easier, and changes are better tracked.
The old code was doing "smiley-text to image" lookup by converting everything to lowercase, then doing a
case insensitive lookup. My last commit made that lookup case sensitive, which caused lookups for :-D and :-P to fail.
This commit remove the to-lowercase conversion of the text that's used in the lookup, fixing those instances again.
