Merge branch 'branch-creation-flow' into 'master'

Branch creation flow

To improve user experience with web editing I did next improvements:

* when create branch via ui - redirect to tree view so you start add/edit files
* when click on branch name - redirect to tree view instead of commits so you can immedialty add/edit files

app/controllers/projects/branches_controller.rb

@@ -17,9 +17,9 @@ class Projects::BranchesController < Projects::ApplicationController
   end
   def create
-    CreateBranchService.new.execute(project, params[:branch_name], params[:ref], current_user)
-    redirect_to project_branches_path(@project)
+    @branch = CreateBranchService.new.execute(project, params[:branch_name], params[:ref], current_user)
+    redirect_to project_tree_path(@project, @branch.name)
   end
   def destroy

app/views/projects/branches/_branch.html.haml

 - commit = @repository.commit(branch.target)
 %li
   %h4
-    = link_to project_commits_path(@project, branch.name) do
+    = link_to project_tree_path(@project, branch.name) do
       %strong= truncate(branch.name, length: 60)
       - if branch.name == @repository.root_ref
         %span.label.label-info default

app/views/projects/tree/show.html.haml

 %div.tree-ref-holder
   = render 'shared/ref_switcher', destination: 'tree', path: @path
 - if can? current_user, :download_code, @project
-  = render 'projects/repositories/download_archive', ref: @ref, btn_class: 'btn-group-small tree-ref-holder pull-right', split_button: true
+  = render 'projects/repositories/download_archive', ref: @ref, btn_class: 'btn-group-small pull-right', split_button: true
 %div#tree-holder.tree-holder
   = render "tree", tree: @tree

features/steps/project/browse_branches.rb

@@ -44,7 +44,7 @@ class ProjectBrowseBranches < Spinach::FeatureSteps
   end
   step 'I should see new branch created' do
-    within '.all-branches' do
+    within '.tree-ref-holder' do
       page.should have_content 'deploy_keys'
     end
   end