Return value if value are 0

Save correctly if the value is 0, but after the find is returned as an empty string.
Clearer error message
wording
adding test
Merge pull request #2612 from dereuromark/master-fixture

Clearer error message when fixture insertion fails.
Add test for issue #2595

Fold conditions that did the same thing and add a test case.

Closes #2595
Merge branch 'translate-patch'
Exclude lib/Cake/Test when building pear packages.

The core tests include a number of files that cause grief when the
cakephp pear package is installed via composer. Excluding the core tests
solves all of these problems and makes a smaller package which is nice.

Fixes #2620