OTScriptable: replace OTCleanup with std::unique_ptr
OTSmartContract: replace OTCleanup with std::unique_ptr
Merge pull request #94 from toxeus/removeOTCleanup

Remove OTCleanup
Merge pull request #95 from murrekatt/develop

Fixed bug in OTCron introduced by commit 0cb43362
Rename api to client.