License notice update for each source code file

[hwpplayer1]

I wrote license for each source code file, Thanks for making your project Free Software and happy hacking !

[mekramy]

Change algos.go package name will break the code!

[hwpplayer1]

@mekramy Do you please elaborate this issue ? Should I change algos.go name and make it crypt_algo.go for instance ?

[mekramy]

Thanks for your collabration.
Please replace package algos with package crypto in algos.go.