I installed the latest version of lessc and they have modified their
output slightly. Update the errorformat for this.
Also, they new output is colorized by default. So I have added an option
to specify args to the checker that currently defaults to "--no-color".
This means that if people want to use an older version of lessc, they
will need to reset this option to an empty string.
Many of the syntax checkers were setting the 'bufnr' key for each
error manually and one was setting 'text' if it didnt exist too.
Add the 'defaults' option to SyntasticMake to set default values in the
returned error list - it only sets values if they are empty.
