Version bump to 1.8.0 (#118)

Northover · web-flow · commit 0a70d2dc7ed0 · 2017-07-31T15:55:22.000-04:00
* Version bump to 1.8.0

* Update history
diff --git a/HISTORY.rst b/HISTORY.rst
@@ -1,6 +1,13 @@
 Release History
 ---------------
 
+1.8.0 (2017-07-31)
+++++++++++++++++++
+*CAA Record support
+*Exponential backoff on blocked tasks
+*Misc bug fixes
+
+
 1.7.10 (2016-12-08)
 ++++++++++++++++++
 *TSIG names can now be attached to `dyn.tm.zones.ExternalNamserver`
