Fix 32 bit os issue with argument parsing -> strtoll returns 64 bits integer but strtol returns 32 bits integer, on x64 strtol and strtoll are the same
Fixed the PropEr tests for empty appends
Merge pull request #25 from AlexandreBeaulne/unstable

Fixed the PropEr tests for empty appends
Merge pull request #26 from GARY46/c-driver

Fix 32 bit os issue with argument parsing (strtol -> strtoll)
Removes O(n) function from the critical path.