Fix method signature for CakePHP 2.4.1 to fix E_STRICT warnings

See: http://bakery.cakephp.org/articles/markstory/2013/09/15/cakephp_2_4_1_released
Merge pull request #160 from Cruel/master

Fix method signature for CakePHP 2.4.1 to fix E_STRICT warnings
add doco for installing with composer

Signed-off-by: Joshua Paling <joshua.paling@gmail.com>
Merge pull request #162 from joshuapaling/doco-composer

add doco for installing with composer
Fix error in isFileUploadOrHasExistingValue when adding new record.

I usually merge my add and edit views, so even an add view will have an id field, but it will be empty. However, if you use a separate add view, with no id field, then you'll get an "undefined index" error when using the isFileUploadOrHasExistingValue validation. This commit prevents that error.

Signed-off-by: Joshua Paling <joshua.paling@gmail.com>
Merge pull request #156 from joshuapaling/master

fix 'Undefined index: id' errors in isFileUploadOrHasExistingValue when ...
Release 1.0.0
Move plugin repository to cakephp-upload