add mysql-postgresql-converter submodule, and updated document

.gitmodules

@@ -0,0 +1,3 @@
+[submodule "database/migrate-mysql-to-postgres/mysql-postgresql-converter"]
+	path = database/migrate-mysql-to-postgres/mysql-postgresql-converter
+	url = https://github.com/lanyrd/mysql-postgresql-converter.git

database/migrate-mysql-to-postgres/README.md

@@ -1,3 +1,5 @@
+***The following howto assumes that you are running Debian 7 (wheezy)***
+
 # Stop Gitlab
 
 ```bash
@@ -12,6 +14,8 @@ sudo apt-get install -y postgresql-9.1 postgresql-client libpq-dev
 
 # Initial Setup
 
+The following initial setup was taken from installation.md from the main installtion doc
+
 ```bash
 # Login to PostgreSQL
 sudo -u postgres psql -d template1
@@ -38,6 +42,8 @@ sudo -u git -H bundle install --deployment --without development test mysql aws
 
 # Dump the mysql database
 
+Make sure you do this as root, and therefore you will also need the root password for mysql as well
+
 ```bash
 mysqldump --compatible=postgresql --default-character-set=utf8 -r /tmp/gitlabhq_production.mysql -u root -p gitlabhq_production
 ```
@@ -46,9 +52,11 @@ mysqldump --compatible=postgresql --default-character-set=utf8 -r /tmp/gitlabhq_
 
 ```bash
 wget https://raw.github.com/lanyrd/mysql-postgresql-converter/master/db_converter.py -O /tmp/db_converter.py
-python db_converter.py /tmp/gitlab_production.mysql /tmp/gitlab_production.psql
+python /tmp/db_converter.py /tmp/gitlab_production.mysql /tmp/gitlab_production.psql
 ```
 
+***Note:*** This was tested using debian 7, with python 2.7.3
+
 # Import the database
 
 ```bash
@@ -63,9 +71,28 @@ sudo -u git -H cp database.yml database.yml.backup
 sudo -u git -H cp database.yml.postgresql database.yml
 ```
 
+The defaults from the database.yml should work if you have not made any modifications to the postgres authentication. You may need to change database.yml to suite your config.
+
 # Start Gitlab service
 
 ```bash
 service gitlab start
 service nginx restart
 ```
+
+# Check application Status
+
+Check if GitLab and its environment are configured correctly:
+
+```bash
+cd ~git/gitlab
+sudo -u git -H bundle exec rake gitlab:env:info RAILS_ENV=production
+```
+
+To make sure you didn't miss anything run a more thorough check with:
+
+```bash
+cd ~git/gitlab
+sudo -u git -H bundle exec rake gitlab:check RAILS_ENV=production
+```
+