[azuwis] fix bug when opening images file that ext is not correct

[azuwis] misc staff

Support GIF transparent color by changing the palette, credited by azuwis.

Fix git commits, please remember NEVER merge/pull in git-svn branches!!!

fix freed memory overwrite when returning to last viewed files

fix text_open_binary_* sprintf function call over-fence

Fix seeking to beginning failure when playing some MP3

Check font buffer whether is valid before loading bitmap.

accelerate music list loading

fix crash when music list is too large

Test PSP_MODEL_STANDARD instead of PSP_MODEL_SLIM_AND_LITE

fix typo

update Readme&Changelog

move show_encoder_msg to config and add to scene as a new setting

Revert "enter freq hotzone when reading mp3 brutally"