Reason: timestamp_from is required by default now.

Issue warning if timestamp_from is not found in the list of required_detectors, but add it by default

Deployment: switch to CVMFS S3 storage

See merge request corryvreckan/corryvreckan!278

1% to 10% more tracks found

Define new vector to actually find the first and last detector along z (excluding DUT) as reference detectors

Add early stage determination whether a track is still possible to find with the remaining detectors.
Significant reduction of computing time depending on the number of detectors

Previous method: Loop over all clusters in one reference plane, loop over other detectors and check for clusters close to the track. For the second detector only clusters straight ahead are accepted, leading to a very limited angular acceptance.
New method: Loop over each combination of clusters in two reference planes, then proceed as before: check for clusters close to the track.
Improves angular acceptance and overall probability of track finding, since the previous implementation discarded clusters for which the first track attempt did not lead to a track.

Fix fix of coord transformation

See merge request corryvreckan/corryvreckan!275

Add overloaded method to KDTree that allows to get all clusters in a time window with respect to a timestamp instead of a cluster

Revert "testing: update PASS conditions after having changed getColumn()/getRow() and getLocalPosition() of the detector class (this affects hasIntercept())"

This reverts commit c091264a.