added support to configure sass compiler, sassc is way fast

[ermeaney]

I am working on a new theme using Foundation 5 using the sass sources. Compiling with the Ruby implementation of sass is sort of slow, and I wanted to be able to use sasc which is implemented in C++ and is way faster.

This pull request adds a configuration option SASS_COMPILER which defaults to 'sass' but allows you to configure which compiler you want to use.

[Kwpolska]

1. add yourself to authors.txt
2. make a note in changes.txt
3. add [email protected] to your GitHub emails
4. I’ll handle the shell= fix myself

[ralsina]

Looks good to me! (after you fix what @Kwpolska said)

[Kwpolska]

Also, this invalid email issue is prevalent. I should write a script that automates fetching the address (github is not helpful). For the record:

cd /tmp
git clone [email protected]:AUTHOR/nikola --branch xyz
cd nikola
git log
# copy-paste the address into the comment

[ermeaney]

@Kwpolska
Please bear with me, pretty new to git and this is my first pull request. Is this something you need me to do?
I am making the changes you mentioned now, but if there is something else you need me to do I wan tto take care of that first.

Thanks,

[Kwpolska]

No, disregard those commands. You won’t get anything out of them.

Looks well. Merging.

[Kwpolska]

It looks like there are no alternative LESS compilers, therefore I decided not to support setting a LESS compiler. If there is one, we can easily add it later.

[ralsina]

Actually... https://github.com/twitter/recess

[Kwpolska]

This thing actually depends on the official lessc compiler.

[ralsina]

Yes but it produces different output.

[Kwpolska]

there, done.