[IMPROVED] Added balance checks post payouts

Fixes #904 once merged.
Update README.md

Removing some unused pools.
[UPDATE] Cache RPC getinfo calls
Merge branch 'next' of https://github.com/TheSerapher/php-mpos into next
[ADDED] getInfo output to wallet information

Adds some additional wallet infos to the wallet info page in the admin
panel. Specifically the errors output might be interesting for users not
checking their RPC regularly for mandatory updates.

Fixes #912 once merged.
Merge pull request #913 from TheSerapher/issue-912

[ADDED] getInfo output to wallet information
[FIX] No uptime status on empty result

Fixes #910 once merged
Merge pull request #914 from TheSerapher/issue-910

[FIX] No uptime status on empty result
[CHANGED] Do not send mail on uptime robot update

Do not send a mail notification in case the uptime robot updates are
failing.

Fixes #897 once merged.
Merge pull request #915 from TheSerapher/issue-897

[CHANGED] Do not send mail on uptime robot update
[IMPROVED] Lockout user on invalid pin/password

This will lock a user account if a password or PIN has been entered
wrong for multiple times in a row. When unlocking the account via admin
panel, both counters are reset so the user can log in again.

This should fix issues with brute force attacks to access user accounts.

Please see configuration dist file for new config options.
Please import SQL upgrade 007 to add new column to user accounts table.

Addresses #670 and should be merged once tested.
[ADDED] ACL to hide news post author

This will allow admins to hide the actual username/author from their newsposts.
Useful if you don't wish to give your admin account away or in case you
have no admin-only account.
[ADDED] Transaction summary to getuserstatus API

Fixes #917 once merged.
Merge pull request #918 from TheSerapher/issue-917

[ADDED] Transaction summary to getuserstatus API
Merge pull request #919 from TheSerapher/issue-904

[IMPROVED] Added balance checks post payouts
Merge pull request #920 from TheSerapher/issue-670

[IMPROVED] Lockout user on invalid pin/password
[UPDATE] Do not send mails on disabled payouts

Fixes #928 once merged.
Merge pull request #932 from TheSerapher/issue-928

[UPDATE] Do not send mails on disabled payouts
[UPDATE] Added failed_pins to base structure
[FIX] Network hashrate in dashboard

Also adds some fixes for hashrate updates on the pool statistics page in
case the API is disabled alltogether.

Fixes #934 once merged.