Tibibyte -> Tebibyte

Correct name is 'Tebibyte'.
Reworked test structure

Moved tests for single logical units together inside a separate class.
It should be easier to extend those in the future.
Added integration guidelines for several build tools

Although Maven is ubiquitous, there are still several people using
other build tools. These should be probably documented.
Removed redundant POM information
JUnit import change

Switch to the newer org.junit.Assert