[test] Disable file read permission test

File permission tests are failing too often due to false positives, even
on platforms with permissions it may fail if ran as the superuser.

Signed-off-by: Claudio Matsuoka <cmatsuoka@gmail.com>
Remove duplicate checks in mod loader

Validity of ?CHN and ??CH modules is verified in module testing so no
need to check again in module load.

Signed-off-by: Claudio Matsuoka <cmatsuoka@gmail.com>
[test] Add corrupted module load test

Signed-off-by: Claudio Matsuoka <cmatsuoka@gmail.com>
Free resources if module load fails

If a module load fails, free all resources to prevent memory leaks. Loaders
can simply return instead of freeing resources themselves. Remove unused
resource deallocation macros from loader.h

Signed-off-by: Claudio Matsuoka <cmatsuoka@gmail.com>
Add volume slide effects to Graoumf Tracker loader

Implement linear volume slide and fine volume slide effects based on
the neurologic.mtm conversion sent by Misty De Meo.

Signed-off-by: Claudio Matsuoka <cmatsuoka@gmail.com>
Update version number

Signed-off-by: Claudio Matsuoka <cmatsuoka@gmail.com>
Update changelog

Signed-off-by: Claudio Matsuoka <cmatsuoka@gmail.com>