Add support to KTX texture format and zipped KTX textures
Removed unused KTX data structure
Revert "Removed unused KTX data structure"

This reverts commit a30037ef6ae8a40b746f351c9bf704bc8076d90c.
Revert "Revert "Removed unused KTX data structure""

This reverts commit 1263e4ac4cc0f2fecc1846ab782353a0c0713f88.
Fix a little bug with default dialog fading
Revert bug fixing on the fade, waiting for first commit to be reviewed
Minimalist KTX/ZKTX test with file examples (simple 2D texture)
Clean Test commit