fix EConditionalValidator::validateAttribute()

1) Object should be cloned, because the function getAttributes() doesn't return the public properties of model (non-db fields).
2) In validator with several attributes function array_splice() removes all parameters of $rule.
Replaced space indents to tab indents.
Added missing documentation.
Removed echoes used for debugging.
Fixed error when allowEmpty is false and value was empty string.
Added error when allowEmpty is false and value was empty string, which does not show when Required validator is used.
Merge pull request #12 from jiminy/master

fix EConditionalValidator::validateAttribute()
Merge pull request #13 from Wiseon3/master

Fixed errors and modified code so it is consistent through out the file
Adds atom namespace to RSS feeds

This is required for using atom:link tag. Without it items doesn't show up in Firefox and chrome complaints about missing namespace.
Merge pull request #14 from svallory/patch-1

Adds atom namespace to RSS feeds