Switch to sqlite (#22)

* Updated project to use sqlite

* Edited migrations directly because I fear no man

* Updated search functions and tests to work with sqlite

* Updated build tools to remove postgres

.gitignore

@@ -41,3 +41,7 @@ npm-debug.log
 .DS_Store
 scratchpad.md
 /scratchpad/
+
+# Database files
+*.db
+*.db-*