Make the upgrade scripts harmless/error avoiding.

Author: jmhobbs

protected/install/database/update/001/plugin_foursquare.sql

@@ -1,6 +1,6 @@
 SET @saved_cs_client     = @@character_set_client;
 SET character_set_client = utf8;
-CREATE TABLE `foursquare_data` (
+CREATE TABLE IF NOT EXISTS `foursquare_data` (
   `id` int(10) unsigned NOT NULL auto_increment,
   `source_id` int(10) unsigned NOT NULL,
   `guid` varchar(255) NOT NULL,

protected/install/database/update/001/plugin_github.sql

@@ -1,7 +1,7 @@
-DROP TABLE IF EXISTS `github_data`;
+"""DROP TABLE IF EXISTS `github_data`;"""
 SET @saved_cs_client     = @@character_set_client;
 SET character_set_client = utf8;
-CREATE TABLE `github_data` (
+CREATE TABLE IF NOT EXISTS `github_data` (
   `id` int(10) unsigned NOT NULL auto_increment,
   `source_id` int(10) unsigned NOT NULL,
   `github_id` varchar(255) NOT NULL,

protected/install/database/update/001/plugin_gitorious.sql

@@ -1,6 +1,6 @@
 SET @saved_cs_client     = @@character_set_client;
 SET character_set_client = utf8;
-CREATE TABLE `gitorious_data` (
+CREATE TABLE IF NOT EXISTS `gitorious_data` (
   `id` int(10) unsigned NOT NULL auto_increment,
   `source_id` int(10) unsigned NOT NULL,
   `gitorious_id` varchar(255) NOT NULL,

protected/install/database/update/001/plugin_goodreads.sql

@@ -1,6 +1,6 @@
 SET @saved_cs_client     = @@character_set_client;
 SET character_set_client = utf8;
-CREATE TABLE `goodreads_data` (
+CREATE TABLE IF NOT EXISTS `goodreads_data` (
   `id` int(10) unsigned NOT NULL auto_increment,
   `source_id` int(10) unsigned NOT NULL,
   `guid` varchar(255) NOT NULL,

protected/install/database/update/001/plugin_googlebuzz.sql

@@ -1,6 +1,6 @@
 SET @saved_cs_client     = @@character_set_client;
 SET character_set_client = utf8;
-CREATE TABLE `googlebuzz_data` (
+CREATE TABLE IF NOT EXISTS `googlebuzz_data` (
   `id` int(10) unsigned NOT NULL auto_increment,
   `source_id` int(10) unsigned NOT NULL,
   `buzz_id` varchar(255) NOT NULL,

protected/install/database/update/001/shorturl.sql

@@ -1,6 +1,6 @@
 SET @saved_cs_client     = @@character_set_client;
 SET character_set_client = utf8;
-CREATE TABLE `shortUrl` (
+CREATE TABLE IF NOT EXISTS `shortUrl` (
   `user_id` int(11) NOT NULL,
   `token`   varchar(16) NOT NULL,
   `url`     varchar(256) NOT NULL,