ENH: add versioning to paraview plugin support libraries (issue #370)

- use "-pvMAJ.MIN" suffix for similarity with the paraview convention

- use sentinel file to ensure clean change of intermediate targets

- ensure all library files are being properly removed

wmake/rules/General/paraview

@@ -0,0 +1,8 @@
+#-------------------------------*- makefile -*---------------------------------
+# paraview values
+
+# major.minor: eg, /path/paraview-5.0 -> 5.0
+#
+ParaView_MAJOR := $(shell echo $(ParaView_INCLUDE_DIR) | sed -e 's/^.*-//')
+
+#------------------------------------------------------------------------------