Keep binaries

Author: Christopher Jones

.npmignore

@@ -9,7 +9,20 @@ Makefile.win32
 /doc
 /examples
 /test
-/build
+/build/Release/oracledb.node
+/build/oracledb.target.mk
+/build/Release/.deps
+/build/Release/obj
+*.exp
+*.lib
+*.map
+*.pdb
+*.sln
+/build/oracledb.vcxproj
+/build/oracledb.vcxproj.filters
+/build/Release/obj.target
+/build/binding.Makefile
+/build/gyp-mac-tool
 /node_modules
 /oracle_private
 /package/Staging