[FIX] API call for transactions

Fixes #1602 once merged.
Merge branch 'next' of github.com:MPOS/php-mpos into next
Update README.md

Added phone apps.
[ADDED] THash/second modifier
[ADDED] Check if master is read-only

Just to ensure we can run at all.
Merge pull request #1605 from MPOS/thash-modifier

[ADDED] THash/second modifier
Merge branch 'master-read-only-check' into next
[FIX] Do not assign smarty vars if caching hits
Merge pull request #1608 from MPOS/admin-wallet-smarty-cache

[FIX] Do not assign smarty vars if caching hits