Enable detached ascii sig for SHA256SUMS.
add extension logos

Signed-off-by: drebs <drebs@leap.se>
Add missing CHANGELOG.
add copyright info
modify makefile to use template
Merge remote-tracking branch 'kalikaneko/add-assets' into develop
Fix makefile and install.rdf template.
Fix items from mozilla review. Closes #4374.
Merge remote-tracking branch 'andrejb/bug/4374_fix-items-from-review' into develop
Fold in changes.
Merge branch 'release-0.0.2'
Fix version inference in Makefile.
Remove password field from account wizard. Closes #4525.
Merge branch 'feature/4525_remove-password-field-from-wizard' into develop
Remove misleading encryption info from wizard (#4545).
Merge branch 'feature/4545_remove-misleading-encryption-information-from-wizard' into develop
Fold in changes.
Merge branch 'release-0.0.3'