apicalls.py: stringify arguments
apicalls.py: stringify arguments

Since we don't do any calculations on arguments, it's safe to store
them as strings (easy to transfer, don't have to be limited with 8
bytes for bson, etc).

If an argument is an integer (or long), it is converted into a hex
string because, hell, hex rules the world.

Should fix #24

rodionovd/cuckoo-osx-analyzer,cuckoobox/cuckoo,rodionovd/cuckoo-osx-analyzer,cuckoobox/cuckoo,cuckoobox/cuckoo,cuckoobox/cuckoo,rodionovd/cuckoo-osx-analyzer,cuckoobox/cuckoo