free positioned x coords, custom x labels, updated README.md to include

bower instructions

README.md

@@ -47,6 +47,9 @@ With node installed, install [grunt](https://github.com/cowboy/grunt) using
 `npm install -g grunt-cli`, and then the rest of the test/build dependencies
 with `npm install` in the morris.js project folder.
 
+Additionally, [bower](http://bower.io/) is required for for retrieving additional test dependencies.  
+Install it with `npm install -g bower` and then `bower install` in the morris project folder.
+
 Once you're all set up, you can compile, minify and run the tests using `grunt`.
 
 Note: I'm experimenting with using perceptual diffs to catch rendering

lib/morris.grid.coffee

@@ -96,6 +96,7 @@ class Morris.Grid extends Morris.EventEmitter
   gridDefaults:
     dateFormat: null
     axes: true
+    freePosition: false
     grid: true
     gridLineColor: '#aaa'
     gridStrokeWidth: 0.5
@@ -164,6 +165,10 @@ class Morris.Grid extends Morris.EventEmitter
           ret.label = @options.dateFormat ret.x
         else if typeof ret.label is 'number'
           ret.label = new Date(ret.label).toString()
+      else if @options.freePosition
+        ret.x = parseFloat(row[@options.xkey])
+        if @options.xLabelFormat
+          ret.label = @options.xLabelFormat ret
       else
         ret.x = index
         if @options.xLabelFormat
@@ -188,7 +193,7 @@ class Morris.Grid extends Morris.EventEmitter
         yval
       ret
 
-    if @options.parseTime
+    if @options.parseTime or @options.freePosition
       @data = @data.sort (a, b) -> (a.x > b.x) - (b.x > a.x)
 
     # calculate horizontal range of the graph

lib/morris.line.coffee

@@ -193,6 +193,8 @@ class Morris.Line extends Morris.Grid
         labels = [[@data[0].label, @data[0].x]]
       else
         labels = Morris.labelSeries(@xmin, @xmax, @width, @options.xLabels, @options.xLabelFormat)
+    else if @options.customLabels
+      labels = ([row.label, row.x] for row in @options.customLabels)
     else
       labels = ([row.label, row.x] for row in @data)
     labels.reverse()

spec/lib/line/line_spec.coffee

@@ -64,8 +64,29 @@ describe 'Morris.Line', ->
         labels: ['dontcare']
         dateFormat: (d) ->
           x = new Date(d)
-          "#{x.getYear()}/#{x.getMonth()+1}/#{x.getDay()}"
-      chart.data.map((x) -> x.label).should == ['2012/1/1', '2012/1/2']
+          "#{x.getYear()+1900}/#{x.getMonth()+1}/#{x.getDay()+1}"
+      chart.data.map((x) -> x.label).should.eql(['2012/1/1', '2012/1/2'])
+
+    it 'should use user-defined labels', ->
+      chart = Morris.Line
+        element: 'graph'
+        data: [{x:1,y:2}],
+        xkey: 'x',
+        ykeys: ['y'],
+        labels: ['dontcare']
+        customLabels: [{x:3,label:'label'}]
+      chart.options.customLabels.map((x) -> x.label).should.eql(['label'])
+
+    it 'should use relative x-coordinates', ->
+      chart = Morris.Line
+        element: 'graph'
+        data: [{x:1,y:2}, {x:1.2,y:2}],
+        xkey: 'x',
+        ykeys: ['y'],
+        labels: ['dontcare']
+        parseTime: false
+        freePosition: true
+      [chart.data[1].x - chart.data[0].x].should.not.equal(1) 
 
   describe 'rendering lines', ->
     beforeEach ->