Added PGXN files [skip ci]

.gitignore

@@ -1,3 +1,4 @@
+dist
 results
 tmp_check
 regression.*

META.json

@@ -0,0 +1,49 @@
+{
+	"name": "vector",
+	"abstract": "Open-source vector similarity search for Postgres",
+	"description": "Supports L2 distance, inner product, and cosine distance",
+	"version": "0.1.2",
+	"maintainer": [
+		"Andrew Kane <andrew@ankane.org>"
+	],
+	"license": {
+		"PostgreSQL": "http://www.postgresql.org/about/licence"
+	},
+	"prereqs": {
+		"runtime": {
+			"requires": {
+				"PostgreSQL": "9.6.0"
+			}
+		}
+	},
+	"provides": {
+		"vector": {
+			"file": "vector--0.1.1.sql",
+			"docfile": "README.md",
+			"version": "0.1.2",
+			"abstract": "Open-source vector similarity search for Postgres"
+		}
+	},
+	"resources": {
+		"homepage": "https://github.com/ankane/pgvector",
+		"bugtracker": {
+			"web": "https://github.com/ankane/pgvector/issues"
+		},
+		"repository": {
+			"url":  "https://github.com/ankane/pgvector.git",
+			"web":  "https://github.com/ankane/pgvector",
+			"type": "git"
+		}
+	},
+	"generated_by": "Andrew Kane",
+	"meta-spec": {
+		"version": "1.0.0",
+		"url": "http://pgxn.org/meta/spec.txt"
+	},
+	"tags": [
+		"vector",
+		"similarity search",
+		"nearest neighbor search",
+		"approximate nearest neighbor"
+	]
+}

Makefile

@@ -27,3 +27,9 @@ include $(PGXS)
 prove_installcheck:
 	rm -rf $(CURDIR)/tmp_check
 	cd $(srcdir) && TESTDIR='$(CURDIR)' PATH="$(bindir):$$PATH" PGPORT='6$(DEF_PGPORT)' PG_REGRESS='$(top_builddir)/src/test/regress/pg_regress' $(PROVE) $(PG_PROVE_FLAGS) $(PROVE_FLAGS) $(if $(PROVE_TESTS),$(PROVE_TESTS),t/*.pl)
+
+.PHONY: dist
+
+dist:
+	mkdir -p dist
+	git archive --format zip --prefix=vector-0.1.2/ --output dist/vector-0.1.2.zip master