Aside from the base asset_compress.ini all loaded plugins are scanned for asset_compress.ini files. When found they are applied  to the config instance
Detect plugin asset files
Add PATH to the environment
Merge pull request #156 from sime/scss-filter-path

Add PATH to the ScssFilter environment
Plugin test ini
Added tests for targets from plugin ini's
Testing the files included in plugin ini targets
Added whitespace
Merge remote-tracking branch 'upstream/master'
Properly adding modified time, when file exists, of base config to AssetConfig instance.
tearDown method resetting the App paths
UglifyJs requires a '-' to use STDIN

cite: https://github.com/mishoo/UglifyJS2
  If you want to read from STDIN instead, pass a single dash instead of input files.
Merge pull request #157 from zeroasterisk/master

minor correction for UglifyJS
Cleaned up the test plugin ini file
Added helper test for targets from a plugin ini
Only loading the plugin when tests require it
Merge remote-tracking branch 'upstream/master'
Refactored test requiring a plugin to be loaded into seperate files
Added missing test plugin path building
Merge pull request #158 from WyriHaximus/master

Plugin config file support