FAQ and Composite Key renaming
Brought most of the documentation up to date on 2.1
Copy new build process for docs into orm docs from DBAL
Bugfix
Merge pull request #34 from mridgway/DDC-725

[DDC-725] Removed onUpdate property
Merge pull request #35 from mridgway/DDC-1270

[DDC-1270] Fixed invalid expr()->*() function calls; Added isNull and isN
Merge pull request #25 from wilmoore/master

use 'string' instead of 'varchar'
Fixed grammatical errors in working-with-associations.rst
Merge pull request #37 from mdpatrick/associations_grammar_errors

Fixed minor grammatical errors in working-with-associations.rst
Small grammar changes in section explaining lazyload/ArrayCollection.
Merge pull request #38 from mdpatrick/grammar_on_getting_started_xml_edition

Small grammar changes in section explaining lazyload/ArrayCollection.
completed the sentence in section "postUpdate, postRemove, postPersist"
Merge pull request #39 from craue/patch-1

completed the sentence in section "postUpdate, postRemove, postPersist"
Add note about comparing datetime and object by reference
Merge branch 'master' of github.com:doctrine/orm-documentation
Added support to CaseExpression.
[QueryBuilder] added missing $
Merge pull request #40 from hhamon/query_builder_fix

[QueryBuilder] added missing $
Added new support to DQL: ORDER BY now supports SingleValuedPathExpression and INSTANCE OF now supports multi-value checking.
Merge pull request #42 from rouffj/patch-1

Fix typo