Merge pull request #541 from amtriathlon/27740dbe5c3c23d2f2f5112b926b2fae0955e8bc

Update Spanish Translation and enable additional translations in Devices
RideSummary summarise Activities

When summarising a date range we now list the rides
where on a ride summary it would list intervals.

Fixes #542.
Enable translation of welcome text in BlankState.cpp and Wheelsize in Pages.cpp
Merge branch 'master' of https://github.com/GoldenCheetah/GoldenCheetah