Unit cycling fixes

[joseasoler]

K-Mod includes a revamp of how units cycle while issuing commands to them which should be saner. The code has been rewritten multiple times (for example on 82d69ee18d753ad5292b41904ce2875d4292142f and a84c210b72e709ff03edbe7c98c5e0927e0b4517) so the following revisions should only be used in order to identify the code that needs to be ported.

https://github.com/karadoc/Civ4-K-Mod/commit/bb3487370bbe67ba4ad1804979d1c5ab6ce112fb

https://github.com/karadoc/Civ4-K-Mod/commit/0007f87d8293834898e0d68ac26d8cdbf624a0ba

https://github.com/karadoc/Civ4-K-Mod/commit/0669ed90e41dabae54376e7fc3a5642a8d67ce52

https://github.com/karadoc/Civ4-K-Mod/commit/5468391bc9816d0d4a631ebb3acdacd28917e8e6

https://github.com/karadoc/Civ4-K-Mod/commit/59ce058d07d15e2bc38083ba8278d93cc16c5634

https://github.com/karadoc/Civ4-K-Mod/commit/2bc42d01e42b70afab832ddc16d5a49a73980db6

https://github.com/karadoc/Civ4-K-Mod/commit/bcb90e7ae920f4fc18cfabd1262b59539ab39226

https://github.com/karadoc/Civ4-K-Mod/commit/82d69ee18d753ad5292b41904ce2875d4292142f

https://github.com/karadoc/Civ4-K-Mod/commit/a84c210b72e709ff03edbe7c98c5e0927e0b4517

https://github.com/karadoc/Civ4-K-Mod/commit/7c0ac97fbd892747a5d8d9b239cd056fd7a6352d

https://github.com/karadoc/Civ4-K-Mod/commit/311a46576f5df1eb8ae43a4b82b91a4d1c020666

https://github.com/karadoc/Civ4-K-Mod/commit/0a20c9729dbaae1fd331007dc47dbc897c169828 <-- CHECK

https://github.com/karadoc/Civ4-K-Mod/commit/ae439a413a67ba4e73c36dc9b8832ac89c65f61a

https://github.com/karadoc/Civ4-K-Mod/commit/201150ab61534364caaca3bc2c25ea49def1177d

https://github.com/karadoc/Civ4-K-Mod/commit/034f00bd181ae8fdf6b91b9dc61edb20064ce797

https://github.com/karadoc/Civ4-K-Mod/commit/520761b97d0d21f2b8030afc83dff25465b3401b