Update pom.xml with some minor tweaks.

- Change SwingX dependancy from local to external (maven repo).
- Fix indentation.
Merge pull request #514 from MindTooth/tweak_pom

Update pom.xml with some minor tweaks.
Fix issue with filtering breaking on private packs
Set scroll position for map and texture tabs.
Update versions to 1.2.1

Fixed issue with compatible packs having whitespace and causing errors.
Use pack names instead of directories.

trim ALL the things.
Load maps and textures after modpacks.
texture pack filterings
tell me dem packs
make both the logo and description scroll
Gui changes
move old versions combobox
lets move that down there
Fix version box not being set correctly.
Derp.
Double derp.
lets log that again, so people can manually DL
dem tooltips
Start testing with javaw for windows.
Added extra dir values to suppress warnings.

Some extra newlines to differentiate the parts.

Upgraded maven-compiler-plugin to version 3.0
License headers added.

Thanks to Nallar for this old old pull request #137
Might need to make things a little better, possible issue with copyright
symbol.