Prepare for FilesotreAwsS3.

Also adding .project and .classpath.
Add FileStoreAwsS3.GetLocalCopyForRead.

Add the first part of a UT for it.
Finish getLocalCopyForRead(), releaseLocalCopy().
Implement FileSetAwsS3.getFileSet().
Add support for a base dir and regex.
Implement delete().
Add .project and .classpath.
Add FileSetOperations and first method.
Add implementation of getChangedFiles.
Implement areIdentical().
Change debug outout.
Add class FileStoreOperation.
Support regex in some operations.