Proper file list

[rpm] Add files to the file list
Improve diacritics transliteration.
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Replace unsquashfs with unpackfs

Conflicts:
	src/modules/unsquashfs/unsquashfs.conf
Check for fs name validity.
List all files recursively.
Add e-c-m build dependency again

It's required by the partition manager.

[rpm] Add extra-cmake-modules build dependency
Revert "Raise CMake requirement to 3.0+"

This doesn't work when the partition manager is enabled because it
uses ECM and ECMConfig.cmake fails with an error if the required
CMake is not less than 2.8.13

Added a note here to remember about this.

This reverts commit 2020eb0eb306f7319b2376b06acb8e242e7b7dc3.
Merge branch 'calamares'