Downgrade imagemin to a more stable version

grunt-contrib-imagemin 0.5.0 randomly fails by throwing an error or generating empty images. gruntjs/grunt-contrib-imagemin#163
Merge pull request #312 from silvenon/patch-1

Downgrade imagemin to a more stable version
bower notes
templates _package.json updated to use latest version of all packages

Signed-off-by: lhwparis <paris@lan-force.de>
Merge pull request #323 from lhwparis/master

templates _package.json updated to use latest version of all packages
Changed starting options and started changes to Gruntfile

Changed the gruntfile

Fixed up bower and index

Wrong path for bower_components, Wrong notation for config.app and includeCompass fix

Fixed tests

Changed Yeoman options

Implemented libsass and ruby sass.

Corrected the load path for grunt-contrib-sass

Made tests pass

Fixed inquirer.js problem

Removed loadPath option of ruby sass by mistake

Check if sassType exists

Made silvenon's changes

Made ruby default added flag for libsass

Fix for when Sass is not selected

Readme change

Follow up question for libsass along with url to libsass.md

Removed libsass flag from readme