Improve npm dependencies parsing

[romanrostislavovich]

NPM Package dependencies have devDependencies and dependencies, e.g.:

 "dependencies": {
    "optimist": "*",
    "astw": "*",
    "esprima": "*",
    "jshint": "*"
},
"devDependencies": {
    "vows": "~0.7.0",
    "istanbul": "~0.1.10",
    "sinon": "*",
},

This is all dependencies for eslint v0.0.4. I suggest creating separate property dev for dependency package.

New property dev is false by default, but if package use only for development we set true.

Result by parsing for eslint 0.0.4 look like:

[
    { manager: 'npm', package: 'optimist', version: '*' },
    { manager: 'npm', package: 'astw', version: '*' },
    { manager: 'npm', package: 'esprima', version: '*' },
    { manager: 'npm', package: 'jshint', version: '*' },
    { manager: 'npm', package: 'vows', version: '~0.7.0', dev: true },
    { manager: 'npm', package: 'istanbul', version: '~0.1.10', dev: true },
    { manager: 'npm', package: 'sinon', version: '*', dev: true },
]

[romanrostislavovich]

This purpose with new property actual for gem and composer package managers too

[romanrostislavovich]

So, we need to return only dependencies, which needs for correct works of the app. Please, check the getDeps method for all managers

[doroxz-zz]

We don't need devDependencies. They are used for listing, building and testing. So, published npm package can be executed without them.