Correct use of promises.

[OJezu]

fixes #118

Pull request is against v2.0.1 since the newest master broke something in include path resolution.

By using done I made sure that the promise chain won't be interrupted and either the error will be passed to cb or the process will crash. Which is still better than error vanishing.

[yocontra]

Oh so render returns a promise all of the sudden? Interesting

[OJezu]

Well, there was a .then(...) in v2.0.1 already, I just moved things a bit and added .done(). As far as I can tell, less (due to less/less.js#2430) threw an error in the onResolve function, which was the last in chain, so that error never was handled.

[yocontra]

Can you rebase so this can merge? You made the changes on old code

[OJezu]

As I said

Pull request is against v2.0.1 since the newest master broke something in include path resolution.

I.e.

Error in plugin 'gulp-less'
Message:
    'font-awesome/less/variables.less' wasn't found. Tried - /home/ch/src/Browser/style/font-awesome/less/variables.less,font-awesome/less/variables.less in file /home/ch/src/Browser/style/config.less line no. 1
Details:
    type: File
    filename: /home/ch/src/Browser/style/config.less
    index: 0
    line: 1
    callLine: NaN
    callExtract: undefined
    column: 0
    extract: ,@import "font-awesome/less/variables";,
    lineNumber: 1
    fileName: /home/ch/src/Browser/style/config.less

First guess would be something with lodash.defaults being replaced by object-assign.
Anyway, the same fix is at the top of OhJeez/gulp-less#master. I will make another pull request, but please be aware of the error above (which is not detected by unit tests).

[yocontra]

Duplicate of #132