Add section with Pools

[Antoninich]

1) A section with a list of pools sorted by the last forged block has been added to the navigation. There is also the number of registered miners on each pool.

2) Clicking on the pool address opens a page with detailed data on the pool with sections: Transactions and registered miners.

3) By clicking on the number of miners on the Pools homepage, a list of all registered miners opens.

[pir8radio]

1. A section with a list of pools sorted by the last forged block has been added to the navigation. There is also the number of registered miners on each pool.
2. Clicking on the pool address opens a page with detailed data on the pool with sections: Transactions and registered miners.
3. By clicking on the number of miners on the Pools homepage, a list of all registered miners opens.

thanks for adding screenshots of the changes. i like to see what the PR's do in the wild!

[Antoninich]

Added timestamp on first page Pools and changed the location of the columns. The Blocks column comes first.

[pir8radio]

@Antoninich can you modify this to exclude any lines with the same pool address? only the latest reference to a pool should be listed so this is a true list of pools. see production explorer https://explorer.notallmine.net/pools/ it just lists every forged block by a pool. this is due to the trimming being off i believe. removing duplicates should be a decent patch.