[migrations] semester, school_year, class_group, course, relations
[model] relations between semester, school_year, class_group, courses
[model spec] model specs for relations between semester, school_year, class_group, courses
[factory] school_year
[plugin] add bootstrap datepicker with locales
[req specs] for school year and semesters
[controller] school year and semester
[views] school year and semester
changing on school year and semester models
add model specs for semester and school year
routes for school year and semesters
school year factory
locales for semester and school year
js for datepicker
added and edited helpers