Internal compiler error on low-RAM machines

The link to the `monero7` FAQ was dead because it tried to go to a new page

- documentation: change `aeon` to `aeon7`
- change `case` order in `switch` statements
- update README.txt

fix #1202

Co-authored-by: psychocrypt <psychocryptHPC@gmail.com>
Co-authored-by: fireice-uk <fireice-uk@users.noreply.github.com>
Co-authored-by: Lee Clagett <code@leeclagett.com>
Co-authored-by: curie-kief <curie-kief@users.noreply.github.com>

Add info about sysctl.conf so that the settings are preserved.

I removed typos, changed the wording and made the whole thing more noob-friendly.

I chuckled reading that my virus protection software might flag the miner binary as “male ware,” and rewrote that section of the documentation.

I expect that link is something that would be easily lost if another item is added.

- rename all `xmr` to `monero`
- be insensitive while check for set currency
- add function to compate two strings insensitive

- add CMake flag description
- announce Monero and Aeon in README.md
i add FAQ section

- add more documentation
- split documentation into different files