Added echo param to css and js methods.

[jayalfredprufrock]

Ignore this if there was a specific reason you left this functionality out. I just find its handy sometimes to store the generated tags into strings for later outputting.

[jayalfredprufrock]

Also, I updated the lessc.php to the latest version, and bootstrap appears to be working. If somebody else can verify, the docs should be updated.

[bstrahija]

Well, you just added the parameter without it actually doing something :) I will add something like this in a later version.