minor #17 Tweaked progress bar animation (1ed)
minor #17 Tweaked progress bar animation (1ed)

This PR was merged into the 1.0-dev branch.

Discussion
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Tweaked progress bar animation

Before:
![before](https://cloud.githubusercontent.com/assets/162986/4667182/5c288312-555a-11e4-848f-ffd6e278a18c.gif)

After:
![after](https://cloud.githubusercontent.com/assets/162986/4667184/600e8986-555a-11e4-89aa-e7ea9a62781e.gif)

I know it's subjective but I think the second one looks better. Tested on Ubuntu 14.04.

Commits
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ad899c8 Tweaked progress bar animation

javiereguiluz/symfony-installer,symfony/symfony-installer,jzawadzki/symfony-installer,TheKnarf/symfony-installer