issue-1233: added grunt diff

[oliverfoster]

This task is a dev rebuild, checking if files are newer and recompiling if necessary.
It doesn't do a watch or a clean.

Only performs a check on LESS, Handlebars and JavaScript

[aniketdharia]

👍

[lc-thomasberger]

Nice one! Would be good to have a Version of this that watches for json and js/less. If it listens to json changes, you get a really fast compilation time when adding content to the course.

[oliverfoster]

+1 @lc-thomasberger yea, should be pretty easy - following the same pattern.

[oliverfoster]

@lc-thomasberger it takes almost as much time to check if the json is newer as it does to rebuild it and the extra config needed is quite big. can we leave the json out for the moment?

[sarveshwar-gavhane]

@oliverfoster it would be the good enhancement for newer file checking and last modified source files, when will this changes are pushed into the framework.

[oliverfoster]

@sarveshwar-gavhane i need to get the 3 +1s on it

[sarveshwar-gavhane]

@oliverfoster can we close #1445 with this PR or in a separate one ?

[oliverfoster]

a separate one would be good 👍