adding css and icons plugin buycourse
Html and css structure updated plugin, text multilanguage support
update style css plugin buycourse
update style css plugin buycourse
Merge branch 'C7272' of https://github.com/aragonc/chamilo-lms into aragonc-C7272
Merge @aragonc style improvements and add French translation - refs #7272
Merge branch 'aragonc-C7272' into 1.9.x