feat($http): new $http service, removing $xhr.*

Features:
- aborting requests
- more flexible callbacks (per status code)
- custom request headers (per request)
- access to response headers
- custom transform functions (both request, response)
- caching
- shortcut methods (get, head, post, put, delete, patch, jsonp)
- exposing pendingCount()
- setting timeout

Breaks renaming $xhr to $http
Breaks Takes one parameter now - configuration object
Breaks $xhr.cache removed - use configuration cache: true instead
Breaks $xhr.error, $xhr.bulk removed
Breaks Callback functions accepts parameters: response, status, headers

Closes angular#38
Closes angular#80
Closes angular#180
Closes angular#299
Closes angular#342
Closes angular#395
Closes angular#413
Closes angular#414
Closes angular#507

Rakefile

@@ -23,17 +23,14 @@ ANGULAR = [
   'src/service/document.js',
   'src/service/exceptionHandler.js',
   'src/service/hover.js',
+  'src/service/http.js',
   'src/service/invalidWidgets.js',
   'src/service/location.js',
   'src/service/log.js',
   'src/service/resource.js',
   'src/service/route.js',
   'src/service/routeParams.js',
   'src/service/window.js',
-  'src/service/xhr.bulk.js',
-  'src/service/xhr.cache.js',
-  'src/service/xhr.error.js',
-  'src/service/xhr.js',
   'src/service/locale.js',
   'src/directives.js',
   'src/markups.js',

jsTestDriver-coverage.conf

@@ -26,16 +26,13 @@ load:
   - src/service/document.js
   - src/service/exceptionHandler.js
   - src/service/hover.js
+  - src/service/http.js
   - src/service/invalidWidgets.js
   - src/service/location.js
   - src/service/log.js
   - src/service/resource.js
   - src/service/route.js
   - src/service/window.js
-  - src/service/xhr.bulk.js
-  - src/service/xhr.cache.js
-  - src/service/xhr.error.js
-  - src/service/xhr.js
   - src/service/locale.js
   - src/directives.js
   - src/markups.js

jsTestDriver-jquery.conf

@@ -26,17 +26,14 @@ load:
   - src/service/document.js
   - src/service/exceptionHandler.js
   - src/service/hover.js
+  - src/service/http.js
   - src/service/invalidWidgets.js
   - src/service/location.js
   - src/service/log.js
   - src/service/resource.js
   - src/service/route.js
   - src/service/routeParams.js
   - src/service/window.js
-  - src/service/xhr.bulk.js
-  - src/service/xhr.cache.js
-  - src/service/xhr.error.js
-  - src/service/xhr.js
   - src/service/locale.js
   - src/directives.js
   - src/markups.js

jsTestDriver-perf.conf

@@ -24,6 +24,7 @@ load:
   - src/service/document.js
   - src/service/exceptionHandler.js
   - src/service/hover.js
+  - src/service/http.js
   - src/service/invalidWidgets.js
   - src/service/location.js
   - src/service/log.js
@@ -32,10 +33,6 @@ load:
   - src/service/routeParams.js
   - src/service/updateView.js
   - src/service/window.js
-  - src/service/xhr.bulk.js
-  - src/service/xhr.cache.js
-  - src/service/xhr.error.js
-  - src/service/xhr.js
   - src/service/locale.js
   - src/directives.js
   - src/markups.js

jsTestDriver.conf

@@ -26,17 +26,14 @@ load:
   - src/service/document.js
   - src/service/exceptionHandler.js
   - src/service/hover.js
+  - src/service/http.js
   - src/service/invalidWidgets.js
   - src/service/location.js
   - src/service/log.js
   - src/service/resource.js
   - src/service/route.js
   - src/service/routeParams.js
   - src/service/window.js
-  - src/service/xhr.bulk.js
-  - src/service/xhr.cache.js
-  - src/service/xhr.error.js
-  - src/service/xhr.js
   - src/service/locale.js
   - src/directives.js
   - src/markups.js

src/angular-bootstrap.js

@@ -110,17 +110,14 @@
              'service/document.js',
              'service/exceptionHandler.js',
              'service/hover.js',
+             'service/http.js',
              'service/invalidWidgets.js',
              'service/location.js',
              'service/log.js',
              'service/resource.js',
              'service/route.js',
              'service/routeParams.js',
              'service/window.js',
-             'service/xhr.bulk.js',
-             'service/xhr.cache.js',
-             'service/xhr.error.js',
-             'service/xhr.js',
              'service/locale.js',
 
              'apis.js',