Remove trailing .gitkeep
Adapt HTTP headers for new auth requirements on back end
subscript edit for consistent quote marks
Remove filter chain run() call to prevent double action execution
Fix update link
Remove includes to phplib
Move phplib files to components directory for autoimport
Add update and create scenarios for assets
Fixed some problems with asset update

Originally the Asset::populate method would add redundant
AssetCustomAttribute instances with duplicate keys in
Asset::custom. This has been fixed such that when
a duplicate key is found, the old value is overwritten.

QratitudeHelper was previously not specifying an asset to
update in the json it tried to PUT. This has been fixed.
Also, QratitudeHelper::putAsset now returns a code
indicating success.

Finally, some minor model issues were fixed in UpdateAction.