Merge pull request #1662 from UV-CDAT/revert-1541-issue1539_durack1_UpdateIpython3.0.0To4.0.0

Revert 531a4ab

Author: doutriaux1

CMake/cdat_modules/ipython_pkg.cmake

@@ -1,10 +1,10 @@
-set(IPYTHON_MAJOR 4)
+set(IPYTHON_MAJOR 3)
 set(IPYTHON_MINOR 0)
 set(IPYTHON_PATCH 0)
 set(IPYTHON_VERSION ${IPYTHON_MAJOR}.${IPYTHON_MINOR}.${IPYTHON_PATCH})
 set(IPYTHON_URL ${LLNL_URL})
 set(IPYTHON_GZ ipython-${IPYTHON_VERSION}.tar.gz)
-set(IPYTHON_MD5 c4f42e52cf9137b7f06f28ee92f39f20)
+set(IPYTHON_MD5 b3f00f3c0be036fafef3b0b9d663f27e)
 set(IPYTHON_SOURCE ${IPYTHON_URL}/${IPYTHON_GZ})
 
 add_cdat_package(IPYTHON "" "" ON)