Avoid overriding release make target

Signed-off-by: Pauli Nieminen <suokkos@gmail.com>
Remove bogus file from .pro

Signed-off-by: Pauli Nieminen <suokkos@gmail.com>
Add translation quick howto to the README

Signed-off-by: Pauli Nieminen <suokkos@gmail.com>
Add comments to help translators

Qt translation system supports comments that help translator to know
exact meaning of source string. That helps selecting best matching
words for the English text.

Signed-off-by: Pauli Nieminen <suokkos@gmail.com>
Update translations to include comments

Signed-off-by: Pauli Nieminen <suokkos@gmail.com>