Add option to disable timestamps in TOC and libdoc HTML files

[timdegroot1996]

We use libtoc to generate our project documentation but every time we generate them all files have to be committed since they have "changed", when the only actual change is the generation timestamp.

This "problem" was ocurring in both the libtoc document and the libdoc documentation files. To fix this I added an option no_timestamp in the CLI which simply doesn't add Created at ... in the libtoc html file, and searches for the Generated: ... in the libtoc documentation files, where they are replaced with nothing.

Let me know if this is a feature that could be accepted into libtoc!

[amochin]

Merged. Thanks @timdegroot1996 !