Author: David Monllaó
MDL-65639 analytics: Rewording time-splitting methods
http://git.moodle.org/gw?p=moodle.git;a=commit;h=692d691da52f36428144cf717d5ce7ddf154dc00
http://github.com/moodle/moodle/commit/692d691da52f36428144cf717d5ce7ddf154dc00
+ 3.8 en [timesplitting:deciles,core]
+ 3.8 en [timesplitting:decilesaccum,core]
+ 3.8 en [timesplitting:decilesaccum_help,core]
+ 3.8 en [timesplitting:quarters,core]
+ 3.8 en [timesplitting:quartersaccum,core]
+ 3.8 en [timesplitting:quartersaccum_help,core]
+ 3.8 en [timesplitting:singlerange,core]