fix warning

"Commas at the end of enumerator lists are a C++11 extension"
fix implicit cast warnings

(Implicit conversion turns floating-point number into integer: 'double' to 'uint64_t' (aka 'unsigned long long'))
Fix typo which caused the file ivar to be set instead of function
update podspec to version 1.6.1

to coincide with tagging version 1.6.1 which incorporates changes that remove dispatch_get_current_queue() warnings.
Merge pull request #92 from mattjgalloway/FixFunctionNameOnCopy

Fix typo which caused the file ivar to be set instead of function
Merge pull request #95 from cocoa-factory/master

tag 1.6.1 & update podspec to coincide
Merge pull request #90 from diederich/fix/warning

fix warning