Changed phrase_settings.py to phrase-settings.json and added migration function for old php settings file.

lib-php/migration/phraseSettingsToJson.php

@@ -0,0 +1,19 @@
+<?php
+
+$phpPhraseSettingsFile = $argv[1];
+$jsonPhraseSettingsFile = dirname($phpPhraseSettingsFile).'/'.basename($phpPhraseSettingsFile, '.php').'.json';
+
+if (file_exists($phpPhraseSettingsFile) && !file_exists($jsonPhraseSettingsFile)) {
+    include $phpPhraseSettingsFile;
+
+    $data = array();
+
+    if (isset($aTagsBlacklist))
+        $data['blackList'] = $aTagsBlacklist;
+    if (isset($aTagsWhitelist))
+        $data['whiteList'] = $aTagsWhitelist;
+
+    $jsonFile = fopen($jsonPhraseSettingsFile, 'w');
+    fwrite($jsonFile, json_encode($data));
+    fclose($jsonFile);
+}