place sql statements in sep header

include/stmt.h

@@ -0,0 +1,16 @@
+static sqlite3_stmt* remind_stmt;
+static const char remind_stmt_template[] =
+	"SELECT "
+		"title,"
+		"body,"
+		"difficulty,"
+		"repo_link,"
+		"trigger_date,"
+		"started DATE,"
+		"span"
+	" FROM assignment INNER JOIN project on assignment.project = project.rowid "
+	"WHERE who = ?;"
+;
+
+#define stmt_prepare(stmt) \
+  sqlite3_prepare_v2(connection, stmt ## _template, -1, &stmt, NULL)