Updating dependencies

Fix potential security vulnerabilities by updating dependencies.

Be more flexible with the document convert command

documentConvert: Overrule the document convert command, default is 'libreoffice --headless --convert-to pdf --outdir'

new Converter({
    files: ...,
    ...
    documentConvert: 'libreoffice --headless --convert-to pdf --outdir',
    ...
).run();

Update the array helper package.

Update the array helper package, so all packages are safe.

Remove unoconf, update packages

We now use the libreoffice converter.
Unoconf isnt needed anymore.

Use array-helpers package

• Use array-helpers package.

Automate testing

• Check code with mocha tests.
• Use coveralls.

Automate testing

• Use travis.
• Add link to npm stats.

More error details, return also failed files

• Return success and failed files.
• run contains the promise parameters, was on the next function.
• More error details.
• pdf2image error logged.