fix point change transaction formula

Changed to look at the "new" point value for the transaction,
The old formula was looking at the "current" point value.

Change-Id: I7a4861d97846e6994793ca4b60821737108164ee
remove Points Reopened Before and Points Closed Before

History calcs for these values are wrong and unnecessary
If a Task is Reopened, its points will be the same as when it
was closed and any changes will still be picked up in the points
change transaction.

If a Task is closed before the Sprint start, its points should not
be added to the points closed in the past and brought forward to the
present, because points closed is only used to determine current
points remaining.  There is no value in knowing how many points
were remaining in a Sprint that did not exist yet.

Change-Id: I4ada671839518b8a60bd6dc1a861868045488c01
adds default sort start date descending for Sprint projects list

renames and moves classes

Change-Id: I4ed4e13f21612e242bfd0bde6d590ab774c20c17
revert old codes
Merge remote-tracking branch 'upstream/master'