compatibility with php 5.2.x (str_getcsv() is only available in
php 5.3+ and is used by user manager import feature.

- don't die at end of _export()
- internal classs wrapper method for is_uploaded_file() to allow
  overriding for use under cli & without having to upload a file

This moves the template name away from the hook name into the event data (as
the 'tpl' value). Therefore it moves the previous data items into the 'items' sub array.
A 'view' value has also been added to describe in which template file the
event was called ('main' or 'detail').

This way it will be much easier for plugins to consider default cases and
differentiate between main and other layouts.

http://english.stackexchange.com/questions/117552/why-does-information-not-have-a-plural-form

locations corrected, when those values are "url(...)".

Explanation:  In the change to the less css extension, variable
replacements now happen after the less/css files are processed
for correction of relative locations.