Improvements

1) Outlined resource handling class for i18n, image, and keyboard configuration.
2) Replaced all copyright headers with the doxygen format because it allows us to describe each file, among other tings. All copyright names were simply copied over and I added the copyright header to my new class, please double check I updated the copyright headers correctly.
3) Added tooltips to all buttons on the main toolbar.
4) Added missing keyboard shortcuts to every menu item I could.
5) Added translations everywhere I could.
6) Improved the unsaved changes dialog to have Yes (opens a save dialog), No (closes without saving), Cancel (stops the program from closing)
7) Added the missing edit menu where cut, copy, and paste should go in the future.
8) Translated the tool panel as well.
9) Added missing round rectangle tool (with the same arc width and height as GM) and the paintbrush tool suggested in #13
10) Implemented frame preferences handler to remember the maximized state and bounds of the window, uses the key "org/jeie"
11) Added a dialog that now asks for the size when creating a new image.
12) Added a jar description and manifest for building the application jar.

![JEIE Improvements](https://cloud.githubusercontent.com/assets/3212801/5368868/d59737c6-7fd9-11e4-8cd3-e4225177d92b.png)