Bitbucket url doesn't use 'changeset' anymore

+ rename "changeset" to "commits" for url pattern
+ add local repository test
minor #110 Bitbucket url doesn't use 'changeset' anymore (j0k3r)

This PR was merged into the master branch.

Discussion
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Bitbucket url doesn't use 'changeset' anymore

For example: http://hurl.eu/hurls/825b0e84117a66bb48d8f94145f9e39c0d9220e3/199872dd8b10a777484ae371cc338b044b0b309f

-> `HTTP/1.1 301 MOVED PERMANENTLY`

Commits
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b362f15 Bitbucket url doesn't use 'changeset' anymore
Add missing RuntimeException class
bug #112 Add missing RuntimeException class (willdurand)

This PR was merged into the master branch.

Discussion
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Add missing RuntimeException class

Got the following fatal error while running Sismo on a (restricted) web server:

    Fatal error: Class 'Symfony\Component\Process\Exception\RuntimeException' not found in /home/willdurand/ci/sismo.php on line 167

Commits
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37d282f Add missing RuntimeException class
Merge branch 'master' of https://github.com/fabpot/Sismo