v0.1.2 Ordering and subfile name case fix

Changes the order of the packed subfiles to match the order of K-Mod, and
ensures that the case of subfile names is respected in the header sections of
the mod file

tgxpack.exe (windows):
sha1: 8eb7a6a995f2a6a7284af5a63ab5f4b56d2e57b4
sha256: baf69b4bf4b5761b83f3630dd6539cac5112bca422908dd6599df4fd38ebf5aa
md5: a7a3046145b14927ff627dc78f5f26cd

tgxpack (linux):
sha1: ece5f86b9655ace081e8c8bac27e3888f2bcf19a
sha256: 774f27f8da5937f3b64150e9c74983a0fa0fd155c271d52195168124551f30f8
md5: e6633f7c9e6bdd01b04b998a22838e1b