1.2.0

• simplify config for multiple builds
• jsconcat task: opt out of minification with minify:false

Multiple build syntax:

{
  taskname: [
    { build1… },
    { build2… }
  ]
}

or:

{
  taskname: {
    commonOption: 'value',
    0: { build1… },
    1: { build2… }
  ]
}

Previous release (1.1.0) used a builds key instead of arrays/numeric keys.