Fix escaping of column name for specific alter table case

When changing the length of a field, the column name needs to be escaped
properly in postgres.
Merge pull request #101 from owncloud/pgsql-altertable-keyword-escaping

Fix escaping of column name for specific alter table case
Kill unused pear classes
Merge pull request #102 from owncloud/kill-pear-oc8

[OC8] Kill unused pear classes
add getid3 to composer.json and ignore unwanted files
composer update james-heinrich/getid3 and remove old getid3 folder