Fixed autoconf script to test the version numbers correctly
Updated pyshark to work with wireshark 1.10.0

Updated the wireshark bindings in pyshark (sharktools_core.c and friends) to
compile with the latest (1.10.0) version of Wireshark.
Also cleaned up some minor typos in the code.
Added missing #if defined

One CPP check was not updated for wireshark 1.10.0 and caused pyshark to crash
whenever more than one file was opened within one python session.
Handle the case when an iterator is called after it was cleaned up
Fixed a bug that duplicated string values in output

This happened because of incorrect if - else if branching.