Update changelog

Author: Henry Hammond

Changelog

@@ -4,6 +4,8 @@ version 1.0.8 (not yet released)
   in modification clobbered in upgrade to version 1.1.7 (issue 30).
 * added 'facecolor' keyward argument to drawcounties() method; gives user
   ability to fill counties with specified matplotlib color argument.
+* fix drawgreatcircle bug so that lines exiting and reentering a projection
+  region don't draw horizontally across the map. 
 
 version 1.0.7 (git tag v1.0.7rel)
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