Moved some test to src/test
Coding style fix
Organized imports
Moved and renamed some important classes to top level package
Moved GUI resources under src/main/resource/

- renamed org.apache.giraph.debugger.server.* to .gui.*
Moved Eclipse plugin under backend/
Turned backend/ into the root of the source tree
GUI Server serves resources from CLASSPATH

using `Class#getResource()` instead of files on source tree.
Merge pull request #44 from netj/source-tree-restructuring

Source tree restructuring