Hyphen in first variable name (0.0.29)

[DavidOliver]

I found that the following resulted in incorrect CSS and the olive-light colour was not applied:

@variables colors {
    olive-light:#D0D6AB;
    olive:#BAC28A;
    ....

I swapped the first two variables around, and the olive-light colour CSS was then fine:

@variables colors {
    olive:#BAC28A;
    olive-light:#D0D6AB;
    ....

[anthonyshort]

I think this is related to an issue I fixed in the development branch recently. I might not have push it to github yet. Its to do with the variable sorting. Ill take a look at this asap