+0.52.22
+- fix crash in whiptail with new libpopt
+- switch from usleep to nanosleep (Rosen Penev)
+- fix libnewt.pc to enable static linking (Alexey Sheplyakov)
+- fix LDFLAGS order in snack linking (Sam James)
+- use CFLAGS when compiling snack
+- improve configure.ac (Thomas Kuehne)
+- install header and libnewt.pc with shared library (Michael Olbrich)
+
0.52.21
- define env NEWT_NOFLOWCTRL to disable flow control (Robert Gill)
- don't leak memory on errors in dialogboxes