release 0.2.1

$ sha512sum netbsd-curses-0.2.1.tar.xz
ea60a2bb137d248496a1f9ea8a6014d3fd40ef6982a3130332543436a67e76d1f95644820605acd5174c113fc18e013ad27328e8e915081cfe8cd11c1c716aa4 netbsd-curses-0.2.1.tar.xz

http://ftp.barfooze.de/pub/sabotage/tarballs/netbsd-curses-0.2.1.tar.xz

Changelog:

• fixes for C++ compat
• imported upstream changes:
  • new immedok(), syncok(), is_term_resized, resize_term(), is_pad(), ripoffline(), slk_*()
  • bugfixes
  • updated terminfo db to 2017-01-28