Remove use of fatjar plugin
Use patched version of simpleweb to fix path parsing.

Simpleweb incorrectly parses some paths containing dots (issue
http://sourceforge.net/p/simpleweb/bugs/43/) and paths containing
escaped slashes (it unescapes them before actually parsing the path,
issue http://sourceforge.net/p/simpleweb/bugs/44). Included
libs/simple-5.1.7.1.itkach.jar is patched version that fixes both
issues, or at least fixes them enough for this program's purposes.
bump version