Fixes #2760

One class missed and one non-existing in example at "Supporting Other Databases" page.

At lest it looks like one to me.

This applies the following fixes to DBAL web docs:

- Fix broken ServerGrove image on footer
- Fix occasional link overlap
- Delete .DS_Store file in bootstrap folder
- Finish PR #3 "<ol/> styles fixed" (margin-bottom)
- Fix <ol/> styles
- Synchronize docs layout menu with main site.
- Show versions only when having more than one.

Closes #1882

The oci8 driver can connect using oci_pconnect to make persistent connections. Doctrine has support for this if the persistent boolean value is set to true in the documentation. However, this information was not documented.

The current driver has no option to allow the usage of SSL connections on mysql. I've used the same name params as mysql client.
An example of mysql client usage would be:

mysql --ssl-ca='path_to_ca.pem' --ssl-cert='path_to_client_cert.pem' --ssl-key='path_to_client_key.pem'

refactor secure connection as params

remove space

add space

refactor secure connection

rename method

rename method

docs: add ssl params to use in mysqli driver

rename test method

refactor method setSecureConnection

fix bug

add comment to method

remove string escaping

guid type not bolded

Add description for OnSchemaAlterTableAddColumn, OnSchemaAlterTableRemoveColumn, OnSchemaAlterTableChangeColumn, OnSchemaAlterTableRenameColumn events

Added parameter "default_dbname" to pdo_pgsql driver which can be used to override the default database

PostgreSQL allows the user to set the application_name is connecting
to database. It is useful for monitoring purposes.
Currently one could just manually add 'application_name=foo' to DSN,
but having a parameter eases setting it using DoctrineBundle.

The first paragraph of section 6.1 has some minor formatting errors (see http://docs.doctrine-project.org/projects/doctrine-dbal/en/latest/reference/transactions.html#transaction-nesting)
Removing a couple of spaces fixes the problem.

Features and changes:
* jsonb can be used with: options={"jsonb"=true}
* OVER is no longer reserved
* LATERAL is now reserved