Feature/73 add quality option for optimizing images

[mm-paulie]

If you add lowestImageQuality to your settings in the .sharedrc config and describe a quality percentage (default is 60) you can set the quality of the image compression lower or higher, example:

  "settings": {
    "browserSupport": [
      "> 1%",
      "not ie 11"
    ],
    "maxFileSize": 20,
    "optimizeToFileSize": true,
    "lowestImageQuality": 20
}

For testing:

• checkout mediamonks/display-dev-server
• switch to my for and then to this feature branch
• in this branch, type npm link and npm install
• create a new banner, by running yo display-boilerplate and npm install
• then type your newly created setup folder: npm link path-to-feature-branch ie npm C:\Users\paulie\git\m\mediamonks\da-framework\display-dev-server
• if all has been tested, in your display-dev-server folder, type npm unlink to get back your original display-dev-server rather than my forked one :)

[mm-vasyl]

works for me

[Syridiana]

Awesome ! Works on my end

[xaviergdiez84]

Works here as well :)