Minor issues left over from initial review

[GBuella]

Make the number of ELF section headers being tracked dynamic, or just add a comment about the array size being dynamic.
Elf64_Shdr headers[0x10];
"magic number - pls, comment on why it's 0x10"

Document in Readme.md what each dependancy is used for.
"perl -- for checking code style errors (or something similar)"

Fix man page installation
See debian/libsyscall-intercept.dev.manpages