Fixed a bug in the record times, in which the run start times were being ignored.
For the px1500 digitizer, moved acquiring the timestamp for each record to after the record record values are acquired to avoid the variable time it takes the px1500 to get the first record
Moved acquisition of record time to after the record data is transferred on all digitizers.
Merge branch 'fix-timebug' into develop
Bumped version to 2.6.3