Fix eclipse location with spaces issue, and throw exception if current path contains a ! as it will screw over a lot of java's paths.
added libs folder for dependencies
fixes #29
fixed asset downloading and crashing
updated fernflower download url to the temporary one, to spare modders
working on both 1.6.4 and 1.7.2 the hassle and waste of redownloading
this multiple times.
Merge pull request #47 from The-TTP-Project/master

updated fernflower download url to the temporary one
pulled in 1.6 fixes