ChangeLog

Fixed stalled updater after error in the updater due
to network issues.
Fixed huge memory leaks, (i.e) Allocation of Block Replies
were never freed by the program and were given the work to
Qt and the operating system. Now we explicitly and safely delete
all memory we allocate, Still there is a minor leak which needs
to be fixed on the next release.
Fixed stalled updater on close of the progress dialog on a
active update. (i.e) When the updater dialog was simply closed
using the window buttons, The updater does not cancel itself.
Instead it would continue the update in background.
Better handling of the redirected target file url. In the past
errors were caused due to expired target file urls. THis is fixed
now by resolving the redirects at the block range downloader and
not the control file parser.
Other small fixes and added type safety when using QObject::sender()

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