Added Default age Groups
Added the default groups

Merge branch 'master' of https://github.com/thl-mjv/euromomo

Conflicts:
	tests/testthat/defaults-example.txt
Added the default age groups
..
..

Merge branch 'master' of https://github.com/thl-mjv/euromomo

Conflicts:
	R/reader.R
..
..