Add support for PostgreSQL as a DB storage back-end (#431)

Gopkg.lock

@@ -91,7 +91,7 @@ memo = "404d058cf6b46d820e153afc5721e1ab2aa2b10ec345d969b9c460097f99add3"
 
 [[projects]]
   name = "github.com/jinzhu/gorm"
-  packages = [".","dialects/mysql","dialects/sqlite"]
+  packages = [".","dialects/mysql","dialects/postgres","dialects/sqlite"]
   revision = "5174cc5c242a728b435ea2be8a2f7f998e15429b"
   version = "v1.0"
 
@@ -123,7 +123,7 @@ memo = "404d058cf6b46d820e153afc5721e1ab2aa2b10ec345d969b9c460097f99add3"
   branch = "master"
   name = "github.com/kotakanbe/go-cve-dictionary"
   packages = ["config","db","jvn","log","models","nvd","util"]
-  revision = "8fb43afc719094af43ed782c567d30b58557ac78"
+  revision = "d47709be4cc24d2c77a7be9096dcfcf211ba1d57"
 
 [[projects]]
   name = "github.com/kotakanbe/go-pingscanner"
@@ -137,6 +137,12 @@ memo = "404d058cf6b46d820e153afc5721e1ab2aa2b10ec345d969b9c460097f99add3"
   packages = ["."]
   revision = "e7519b8c80ba008a3bfc57ffa31232bf2a77f455"
 
+[[projects]]
+  branch = "master"
+  name = "github.com/lib/pq"
+  packages = [".","hstore","oid"]
+  revision = "2704adc878c21e1329f46f6e56a1c387d788ff94"
+
 [[projects]]
   name = "github.com/mattn/go-colorable"
   packages = ["."]