Use correct setup class to create product attributes

When creating product attributes, use Mage_Catalog_Model_Resource_Setup so that the additional product specific fields (e.g. is_configurable) are populated.
Merge pull request #195 from aligent/bugfix/194-product-attribute-setup-class

Use correct setup class to create product attributes
[BUGFIX] Issue #202 - Permission error on Nexcess servers
Merge remote-tracking branch 'origin/develop' into develop
[TASK] Updated changes file

[skip ci]
[TASK] Changed creation of Finder objects. Removed creation with "new".

[skip ci]
[BUGFIX] Fixed issue #197 - Doesn't run when /tmp/magento/var exists and database is not created / tables missing
[BUGFIX] Fixed issue #197 - Doesn't run when /tmp/magento/var exists and database is not created / tables missing
[BUGFIX] Fixed issue #197 - Doesn't run when /tmp/magento/var exists and database is not created / tables missing

Catched error if i.e. database not correct defined.
[TASK] Added verbose debug message.
[FEATURE] Merged pull request #203 - Added 2 new commands for extension dependecies tracking, some phpdocs cleanup
[TASK] Changed tests (broken in older Magento Versions).
Updated readme.
[TASK] Bumped version

[skip ci]
[TASK] Disabled check for Mage_Directory module which is not available in older Magento versions.
Merge branch 'develop'