This commit changed a few things in the backend and classes code:
* Any <type>_PPS transaction does NOT need to be confirmed
* Queries updated for added <type>_PPS transactions
* Template updated to properly display these transactions
Cronjob
* Added pps_payput cron to run payouts based on worker submitted shares
* **IMPORTANT**: Can NOT be run with proportional_payout!
Addresses #70
* Findblocks cronjob changes
* Find & Store upstream share
* Use last found `share_id` as starting ID or `0`
* Find & Store upstream finder
* Use last found `share_id` as starting ID or `0`
* Use stored information when running propotional payout
* Fetch current checked blocks upstream share from block table
* Fetch previous upstream share of previous block from block table
* Calculated payouts in that range of IDs
* Updated `block.class.php` to store share_id in block and fetch highest `share_id`
* Fetch all blocks unaccounted for in ASC oder (low to high height)
* Use lowest height block to find lowest ID upstream accepted share
* Use this share as the finding share for a block
* Set share as last found upstream share for further blocks
* This only applies if shares are not deleted at all which they should!
