Normalize project path in Project::setPath

This will remove consecutive slashes as well as . and ..
characters and make path comparisons accurate.

Closes atom/tree-view#191

spec/project-spec.coffee

@@ -190,6 +190,11 @@ describe "Project", ->
         expect(atom.project.getPath()?).toBeFalsy()
         expect(atom.project.getRootDirectory()?).toBeFalsy()
 
+    it "normalizes the path to remove consecutive slashes, ., and .. segments", ->
+      atom.project.setPath("#{require.resolve('./fixtures/dir/a')}#{path.sep}b#{path.sep}#{path.sep}..")
+      expect(atom.project.getPath()).toEqual path.dirname(require.resolve('./fixtures/dir/a'))
+      expect(atom.project.getRootDirectory().path).toEqual path.dirname(require.resolve('./fixtures/dir/a'))
+
   describe ".replace()", ->
     [filePath, commentFilePath, sampleContent, sampleCommentContent] = []
 

src/project.coffee

@@ -84,6 +84,7 @@ class Project extends Model
   #
   # * `projectPath` {String} path
   setPath: (projectPath) ->
+    projectPath = path.normalize(projectPath) if projectPath
     @path = projectPath
     @rootDirectory?.off()