Added CHANGES.md, dependency on com.tguzik:annotations and renamed+modified ToStringStyle in BaseObject.

* BaseObject.MULTILINE_NO_ADDRESS_TOSTRING_STYLE renamed to
  BaseObject.MULTILINE_NO_ADDRESS_STYLE.
* Changed the style for BaseObject.MULTILINE_NO_ADDRESS_STYLE to
  include commas (",") as a part of the field separator (it will
  typically appear at the end of each line, except for the first
  and the last one).
* New dependency on com.tguzik:annotations:0.3 (jsr305 still
  available as transitional dependency)