Science Doc Updates

.. remove references to aerobic and anaerobic threshold as they
   are not really used in the literature anymore

.. remove talk of training interventions and just point out that
   power at LT2 (CP/FTP) is a good indicator of endurance performance

.. we should add a section on MU recruitment and fatigue and
   training interventions with the new features in v3.2
Fix for cadence only sensor

Was not detecting that pedalling had stopped, therefore the previous
cadence rate was displayed indefinitely.
Spanish translation fixes contributed by Omar Torres (omar.torres@gmail.com)
Merge pull request #1032 from amtriathlon/master

Spanish translation fixes contributed by Omar Torres
Recognise Omar Torres
Merge pull request #1033 from dresco/cadence_fix

Fix for cadence only sensor
Fix Crash on Clear during LTM compare seasons

.. initialising settings too late.
Less qDebug on ANT+

.. it seems to be working ok

.. it provides too much output, even for debugging purposes

.. it isn't relavent for 99% of users now its in the master
   repository and being compiled up and used
Matches metric

.. how many >2kj matches did you burn ?

.. also taken out the power/slope derived data series
   since Jon is migrating it to a fix tool
merge upstream into master