* Problem: zmq_z85_decode does not validate its input
Solution: added checks for invalid characters and overflows
* Added tests, added further check for range overflow, removed (multiple) calls to strlen
* Problem: gcc fails to build
Solution: added missing include directive
* Added VS2015 test_utils_z85 project
* Fixed indentation and copyright notice
* Resolved garbage from merge
* Revert "Added VS2015 test_utils_z85 project"
This reverts commit c58b3c664c.
* Problem: test calls zmq_z85_decode with a NULL dest
Solution: call zmq_z85_decode with a properly sized buffer
* Problem: tests for zmq_z85_* scattered over two files
Solution: merged files
* Removed reference to removed test file from CMakeLists.txt
* Problem: Missing include directive to stdint.h
Solution: Added include directive
* Define __STDC_LIMIT_MACROS before including stdint.h
* Problem: Wrong variable is checked for invalid character marker
Solution: Use correct variable
