albertinad/issue 12

Hi @njx  I forked your repo and create this branch to fix the issue #12 as the first implementation.
But in the process I fixed some other issues, below you can find more detail about this changes.

- issue #12

While bower registry is being fetched and downloading modules metadata, the status is displayed not only in the QuickSearch but also in the StatusBar, at the information section. I choose this section because is the one that is more visible for the user, even when he or she hides the Project SideBar and the component can log a little bit more of status information.
When an error occurs or the downloading was successful, the message is updated and then removes the entry from the StatusBar.

![002](https://cloud.githubusercontent.com/assets/2309921/4854983/dd825552-609d-11e4-9bf9-e3a5a4cd1490.png)

I fixed the position of the spinner in the QuickSearch, now looks like the following,

![001](https://cloud.githubusercontent.com/assets/2309921/4854979/b4d50d16-609d-11e4-9797-8845ef9e221d.png)

A new local module is added in order to organize the code and defines components with a single or fewer responsibility: StatusDisplay.
This module exposes an API to create StatusDisplay objects that can display information in the StatusBar, QuickSearch and Project SideBar. I reuse most of the existent code.

- I added some style properties for the text that is displayed when an installation of a bower component is taking place. This avoid the text to overflow when the message is too long without breaking the UI.

![003](https://cloud.githubusercontent.com/assets/2309921/4855031/b4a65966-609e-11e4-8d07-eaff88a90cab.png)

- issues #11 and #14
The key shortcut was updated, I suggest "Shift-Alt-B" combination.

- issue #16
QuickOpen.basicMatchSort updated to StringMatch.basicMatchSort

- The bower dependency was updated to the latest stable version.

In the following days I will be working on fixing the other issues in the backlog.  I also have some ideas that I will like to discuss with you and implement on branches. You can see my work on my fork.

Thanks!
I think it would make more sense to replace the message in the Quick Open bar while it's loading, since that's where the user's attention is focused. However, there probably isn't an API for that in the current QuickOpen code. Might be worth seeing how hard that would be to add in Brackets.