Update README.markdown
Merge pull request #39 from michelsalib/2.4

2.4
Composer : switch to Bootstrap 3

switch to Bootstrap 3
fix bundle but LessPHP still not working with Bootstrap3
#37 drop LessPHP dependency
Doc for v2.4.1
Merge pull request #40 from michelsalib/2.4_bootstrap3

2.4 bootstrap3
Update README.markdown

typo
#40 bootstrap3 views
Annotation CronCommand