Misc improvements

- Renamed the state file from `fresh.yml` to `.fresh.yml`.
- Added option `--state` to override the state file name.
- Renamed the lock file from `fresh.lock` to `.fresh.lock`.
- Added option `--lockfile` to override lockfile file name.

tools/build.sh

@@ -0,0 +1,20 @@
+#!/bin/bash
+
+# chdir into the root from wherever we are
+cd "$(dirname "$(realpath "$0")")/.."
+
+# determine the tag and output base
+TAG="$(git describe --tags)"
+OUT="dist/fresh-${TAG}"
+NOW="$(date +"%Y-%m-%d")"
+
+# create output directory
+mkdir -p dist
+
+# update version.php and build thephar
+echo "<?php define(\"APP_VERSION\", \"${TAG}\"); define(\"BUILD_DATE\", \"${NOW}\");" > src/version.php
+tools/pharlite
+
+# copy raw phar into destination
+cp -v fresh.phar "$OUT.phar"
+