Increment version number to 1.7.2

Author: gaborcsardi

DESCRIPTION

@@ -1,6 +1,6 @@
 Package: ps
 Title: List, Query, Manipulate System Processes
-Version: 1.7.1.9000
+Version: 1.7.2
 Authors@R: c(
     person("Jay", "Loden", role = "aut"),
     person("Dave", "Daeschler", role = "aut"),

NEWS.md

@@ -1,5 +1,4 @@
-
-# ps development version
+# ps 1.7.2
 
 * `ps_system_memory()$percent` now returns a number scaled between 0 and 100
   on Windows, rather than between 0 and 1 (#131, @francisbarton).