index – Extended index for LaTeX including multiple indexes

This is a reim­ple­men­ta­tion of LaTeX's in­dex­ing macros to pro­vide bet­ter sup­port for in­dex­ing. For ex­am­ple, it sup­ports mul­ti­ple in­dexes in a sin­gle doc­u­ment and pro­vides a more ro­bust \in­dex com­mand. It sup­plies short hand no­ta­tions for the \in­dex com­mand (^{word}) and a * vari­a­tion of \in­dex (ab­bre­vi­ated _{word}) that prints the word be­ing in­dexed, as well as cre­at­ing an in­dex en­try for it.