Improve "About" command contents, which are used as the installer help
feature #40 Improve "About" command contents, which are used as the installer help (javiereguiluz)

This PR was squashed before being merged into the 1.0-dev branch (closes #40).

Discussion
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Improve "About" command contents, which are used as the installer help

Improved the contents of the "About" command which is used as the installer help

**Before**

![before](https://cloud.githubusercontent.com/assets/73419/5103605/d7989eb2-6fd9-11e4-95fa-5efd7b8a89d7.png)

**After**

![after](https://cloud.githubusercontent.com/assets/73419/5103608/da4d574c-6fd9-11e4-95a2-fa3b878f313a.png)

Commits
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75202e9 Improve "About" command contents, which are used as the installer help