Minor API changes

Full Changelog: 1.2.1...1.2.2

Added JavaDoc, the library is available in maven central now:

<dependency>
    <groupId>com.ydo4ki</groupId>
    <artifactId>DataStreamLayouts</artifactId>
    <version>1.2.1</version>
</dependency>

Having no args constructor is not necessary anymore

Fixed a synchronization bug in Layout::of

Fixed a bug with dynamic arrays.
Added annotation support to primitives.
Annotations UnsignedByte and UnsignedShort for int fields

Initial release (I'll add README a bit later because this library is for internal usage fistly)