fix reverse engineering LOB type column types in MySQL
fix integer 0 default value reverse engineering on SQL Anywhere
fix reverse engineering quoted table names on PostgreSQL
Removing `composer.lock`, which is gitignored anyway
Merge pull request #572 from deeky666/fix-postgresql-reverse-engineering-quoted-tables

Fix reverse engineering quoted table names on PostgreSQL
Merge pull request #558 from deeky666/fix-sqlanywhere-default-values

Fix integer 0 default value reverse engineering on SQL Anywhere
Merge pull request #553 from deeky666/DBAL-843

[DBAL-843] Fix reverse engineering LOB type column types in MySQL
replace deprecated default value retrieval on PostgreSQL
drop default constraints before altering column type on SQL Server
Merge pull request #542 from deeky666/DBAL-825

[DBAL-825] Drop default constraints before altering column type on SQL Server
Support for Partial Indexes for PostgreSql and Sqlite

Support for Partial Indexes was available in Doctrine 1 following
http://www.doctrine-project.org/jira/browse/DC-82. This commit
reintroduce support for Doctrine 2. We use the same syntax with an
optionnal "where" attribute for Index and UniqueConstraint.