Merge pull request #1611 from DeuxHuitHuit/integration

Added Page::HTTP_NOT_MODIFIED, needed by JIT
Add display mode to Pickable in order to fix #1570
Fix potential error in the Upload field with detecting the mimetype
Tracking latest JIT
Correct install path/url for Windows installs. Fixes #1598
Fix some notices thrown in PHP5.4
Merge branch 'integration' of github.com:symphonycms/symphony-2 into integration
Actually use the constants in the HTTP_STATUSES array instead of fuzzy matching them
Send parameters by reference to reflect delegate.
Merge pull request #1617 from vlad-ghita/patch-3

In section event class, send parameters by reference
Fix some strict/deprecated warnings. Fixes #1613, #1614
Merge branch 'integration' of git://github.com/symphonycms/symphony-2 into integration
Fix handling of Static XML DS's. RE: #1618
Tracking latest JIT
Fix existing Dynamic DS content being erased because the variable was overwritten. RE: #1618
Remove stray var_dump from previous commit
Don't automatically check the Redirect on Empty setting. Fixes #1625
Improve the class loading. Fixes #1620 (This should be replaced by implementing PSR-0 in a later release)
Add Breadcrumb to Data Sources that have the editor disabled. Closes #1627
Correctly handle 0 for the System ID's when filtering. Fixes #1619