[pl] first part of translation of chapter 7
Merge pull request #473 from gibas/07-customizing-git

[pl] first part of translation of chapter 7
Merge pull request #472 from jukkah/master

[fi] Updated Finnish translation
Merge pull request #474 from jukkah/master

[fi] Fixed the problem that caused the build to fail after #472
[pl] fix double dash in comments
Merge pull request #475 from gibas/double-dash-fix

[pl] fix double dash in comments
Fail on REXML exceptions

Maruku uses REXML internally to parse the xml/html snippets. But if
the parsing fails, no error are generated and the task does not fail.

Let the REXML exceptions appear when processing a file so as to validate
html snippets also.
Merge pull request #476 from progit/fail_on_REXML_exception

Fail on REXML exceptions
Merge branch 'master' of https://github.com/progit/progit