Changed location of revent binary on target to be a class attribute so that
it is shared across all instances. Also changed discovery method to a
static method which can be memoized to prevent the target being queried
unnecessarily.
The begining and end of recording timestamps are now stored as part of
the recording. This allows to correctly replay recordings where the
first event occurs some time after the recording started, or the last
event some time before recording ended.
Add pre-built revent binaries for the armeabi and arm64 architectures.
It seems that occasionally an inclomplete recording file is pulled. Add
a one-second (target time) delay to allow SIGINT to be properly handled
and recording to be updated, followed by a sync to ensure the file has
been written.
