Cancel Button for compression

Added a cancel button to the progressDialog of compression manager which
when clicked cancels the compression and deletes the local zip file
created.
Update FileManager/src/org/openintents/filemanager/util/CompressManager.java

Removed extra whitespaces
Update FileManager/src/org/openintents/filemanager/util/CompressManager.java

Fixed small mistake
Update FileManager/src/org/openintents/filemanager/util/CompressManager.java

Indentation fixed
Update FileManager/src/org/openintents/filemanager/util/CompressManager.java

Fixing Indent
Fixing Indent

Fixing Indent
Update FileManager/src/org/openintents/filemanager/util/CompressManager.java
Fixing Indent
Fixing Indent
Fixing Indent
Merge pull request #26 from Dexteroo7/master

Cancel Button for compression