-added liquibase support

install/airtime-upgrade.php

@@ -0,0 +1,10 @@
+<?php
+
+$command = __DIR__."/../library/liquibase/liquibase --driver=org.postgresql.Driver "
+    ."--classpath=".__DIR__."/../library/liquibase/lib/postgresql-9.0-801.jdbc4.jar "
+    ."--changeLogFile=".__DIR__."/upgrade/db.changelog.xml "
+    ."--url=\"jdbc:postgresql://localhost:5432/airtime\" "
+    ."--username=airtime "
+    ."--password=airtime "
+    ."migrate";
+system($command);

install/upgrade/db.changelog.xml

@@ -0,0 +1,23 @@
+<?xml version="1.0" encoding="UTF-8"?>
+ 
+<databaseChangeLog
+  xmlns="http://www.liquibase.org/xml/ns/dbchangelog/1.9"
+  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+  xsi:schemaLocation="http://www.liquibase.org/xml/ns/dbchangelog/1.9
+         http://www.liquibase.org/xml/ns/dbchangelog/dbchangelog-1.9.xsd">
+
+<!-- 
+    <changeSet id="1" author="bob">
+        <createTable tableName="department">
+            <column name="id" type="int">
+                <constraints primaryKey="true" nullable="false"/>
+            </column>
+            <column name="name" type="varchar(50)">
+                <constraints nullable="false"/>
+            </column>
+            <column name="active" type="boolean" defaultValueBoolean="true"/>
+        </createTable>
+    </changeSet>
+-->
+ 
+</databaseChangeLog>