Clean up. Remove trailing whitespaces. Fixed a bit of mojibake.

Again, remove whitespace, turn “Sv�ｽ�ｽrd” into “Svärd”
The [commit w/o whitspace changes](https://github.com/ospalh/Anki-Android/commit/ff359989da34ab0335e0a3e61646c49a213c0a4f?w=1)
This time based off version 2.2.alpha22.

(How i did the whitespace removal (with a tcsh):
```shell
> foreach javafile ( `find . -name \*.java `)
foreach> sed -i 's/[ \t]*$//' $javafile
foreach> end
```
)