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Test basic AssetCompiler
Fix path
use setRoot method
Fix compressor tests
Update test manifest
Add getInstaller, getLinkInstaller
update test assets
uninstall assets when tear down
Fix path rewrite
Fix css import filter
examine the css rewrite and css filter output.
Add compiled manifest.php
simplify manifest spec
Fix test
check manifest filemtime
update compile.sh
recompile assetkit binary
recompile package.xml