Add plugin and re organize the code
Modify Path, names and format code - refs bcourse
MOdify variables name
Rename variables
Add plugin tab
rename variables
add plugin lang to templates
Instance protected plugin correctly and modify default sanbox value
Improve code, translate some variables and modify some comments
Minor - format code.
Minor - fixing PHP warnings.
Fixing gradebook score table see #7153
Minor - format code.
Merge branch '1.9.x' of ssh://github.com/chamilo/chamilo-lms into chamilo19
Minor - fixing PHP warnings.
Minor - Fixing php 5.3 code
Minor - Fixing php 5.3 code.
Fixing gradebook PDF export see #7153
Adding the $mainCourseCategory every where. see #7153
Minor - format code.