Fixed version format to comply with semver
bug #4 Fixed version format to comply with semver (alquerci)

This PR was submitted for the 0.2-dev branch but it was merged into the 0.1 branch instead (closes #4).

Discussion
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| Q               | A
| --------------- | ---
| Bug fix?        | yes
| New feature?    | no
| BC breaks?      | no
| Deprecations?   | no
| Tests pass?     | yes
| Related tickets |
| License         | GNU GPLv3

Commits
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1a84f7e Fixed version format to comply with semver