OTTrade cleanup: rename member vars
OTTrade cleanup: Rename variables, formating
OTTrade cleanup: nullptr
Merge pull request #119 from lclc/trade

OTTrade cleanup
Minor cleanup and ordered header for OTInstrument.
Moved out string helpers into own file.
Moved list of strings into OTString.
Moved map typedef into OTString.
Naming convention for arguments and members in OTString.