tvooo/grunt-latex — pull request #11 by likr (2014-08-01 07:52:56+00:00)
Title: Modify behavior of options set to false

I'm using [generator-latex](https://github.com/LeoColomb/generator-latex) that is a yeoman generator for LaTeX project.
However, bibtex support of generator-latex doesn't run correctly.
Task configuration is as follows:
```
grunt.initConfig({
latex: {
pdf: {
src: 'main.tex',
options: {
outputDirectory: 'dist/',
jobname: 'document'
}
},
bib: {
src: 'dist/document.aux',
options: {
engine: 'bibtex',
interaction: false
}
}
}
```
And, console output is as follows:
```
Running "latex:bib" (latex) task
[ 'bibtex', '', 'document.aux' ]
bibtex: Need exactly one file argument.
Try `bibtex --help' for more information.
```

In this case, `interaction` option must be ignored and console output must be `[ 'bibtex', 'document.aux' ]`.
I modified extractOptions to ignore options set to false.