Update changelogs and bump version for v2.15 release

Signed-off-by: Joachim Wiberg <[email protected]>

Bump version for v2.14 release

Signed-off-by: Joachim Wiberg <[email protected]>

Update diff versions for v2.13

Signed-off-by: Joachim Nilsson <[email protected]>

Update change logs and bump version for v2.12 release

Signed-off-by: Joachim Nilsson <[email protected]>

Update ChangeLog and bump version for v2.11 release

Signed-off-by: Joachim Nilsson <[email protected]>

Update & spellcheck ChangeLogs and bump version for v2.10 release

Signed-off-by: Joachim Nilsson <[email protected]>

Update ChangeLog and bump version for v2.9 release

Signed-off-by: Joachim Nilsson <[email protected]>

Update ChangeLog and bump version for v2.8 release

Signed-off-by: Joachim Nilsson <[email protected]>

Update ChangeLog and bump version for v2.7 release

Signed-off-by: Joachim Nilsson <[email protected]>

Final touch-up for v2.6 release

Signed-off-by: Joachim Nilsson <[email protected]>