remove useless layouts
[Translations] Update Serbian
Merge pull request #114 from pejakm/srtr

[Translations] Update Serbian
Merge pull request #113 from DF1E/master

remove useless layouts
Add missing @Override annotation
Remove unnecessary code
Make util class non-instantiatable and non-extendable.
Add missing @Override annotation, remove unnecessary code
Add missing equals() and hashCode() methods for class that implements Comparable<T>
Fix "'handlers.size() == 0' can be replaced with 'handlers.isEmpty()'"
Fix method names, redundant initialization of variables, typos in comments and other improvements
Make util class non-instantiatable and non-extendable
Use interface instead of concrete class, add missing @Override
Add logging exception, fix typo in comment
Remove redundant variable initialization, flip equals() on strings
Add missing 'private' and 'public' access' modifiers, fix warnings
Make util class non-instantiatable and non-extendable, flip equals() on strings, remove redundant code
Fix that NullPointerException should NEVER be thrown by programmer, make exceptions more informative, simplify code logic, flip equals() on strings

...and other small fixes
Merge pull request #116 from kuc/code-fixes-part2

Code fixes part 2
Smoothed progress bar