Merge pull request #90 from sunithamisra/master

Message about exported files displayed during file-export operation
Merge pull request #91 from sunithamisra/master

Got rid of some warnings pertaining to calling Pyqt4 Gui APIs from within a thread
Merge pull request #92 from sunithamisra/master

Added real-time information on how many files are to be exported at a given time.
Updated bc-reports-tab to allow existing dirs in allreports
Updated bc_disk_access with Select Allocated
Reverted the code which moved the generation of directory structure to outside
the thread. Since directory generation is also a time-consuming process,
it is good to keep it inside the thread, so spinning will continue as the
tree is generated.  With this, the logging code seems to have some issue
(caused core-dump randomly). So commented out the logging code for now.
Merge remote-tracking branch 'upstream/master'