* update buildscript
* address gradle warning about insecure connection
* simplify bit shift
* nested enums are implicitly static
See https://stackoverflow.com/questions/663834/in-java-are-enum-types-inside-a-class-static
* enum constructors are private by design
See https://stackoverflow.com/questions/36286178/java-enum-constructors-private
* semicolon not needed
* replace anonymous class with standard init
The anonymous init takes more space and is harder to understand.
* improve javadoc
* remove duplicate case in switch
* improve javadoc
* simplify float
* simplify init
* remove redundant casts
* minor nitpick on a comment
* rename BACKGROUND to lowercase
* put on separate lines
* remove reduntant semicolons
* simplify isEmpty
* remove commented code, improve javadocs
* spotless
* gradle update buildscript
* explain why >> 0 stays
* Revert "remove redundant casts"
This reverts commit e7bf60e1d2.
* suppress the inspection for redundant casts
They are kept to clarify what the functions accepts.
* spotless vs intellij
Our battle will be legendary!
Martin Robertz