Add DEx payment storage to levelDB
Remove temp commenting
Merge catchup & clean
DEx purchase history storage and gettransaction_MP RPC support
Fix string input for RPC calls to handle decimals correctly
* Added initial handling for tx 54/55/56
RPC fixes for string input
Fixed bugs with the parsing of the issuances
Merge pull request #105 from zathras-crypto/updateRPC

Correct string handling for input in strToInt64 function
*added manual SP grants/revoke historical data to the sp database
*added RPC call getgrants_MP to show this historical data
* More bugfixes
Merge pull request #106 from wanderingbort/manual-issuances

Manual issuances
Merge pull request #101 from zathras-crypto/michael-0921_z

DEx purchase history persistant storage & gettransaction_MP support
merge in michael-0921