polonaise: Add command line options

Change-Id: Ifbadd8bd8eb244611743d61ed820bf3aae584bc2
doc: Add ReleaseNotes and update NEWS

Add ReleaseNotes file which contains detailed description of the current
release.

Add 2.5.0 changelog entry to NEWS.

Change-Id: Ia05d15222f6fd61e0a0cf26e5d3349bb43cfd3c3
build: FreeBSD compatibility fix

Change-Id: I697b912d55ef9c84345498ceb81233a3b7570723