Improve handling of long passwords for command line utility.

Include lower-case "windows.h"

Capitalized Windows.h breaks on MinGW. "windows.h" is the proper include.

Included the arguments added in be3583e3.

Add options for bare output to executable

Test ci

Add alternative JavaScript implementation to README

Remove test with m=20, as it takes too much RAM for many devices.

as it takes too much RAM for many devices.
Reintroduce large test - only for CI environment.

Check for NULL encoded strings. Fixes #120.

Decode

Changed version position in Argon2_Context

- included support for variable length hash, calculate the encoded hash lenght (see P-H-C/phc-winner-argon2#114)
- updated tests
- added test vectors for v16
- updated the checking of test vectors

fixed the implementation for backward compatibility
added tests for backward compatibility
recomputed the test vectors
changed test.sh to return an error code if it is the case
ignore object file generated by OPTTEST

Utilise OPT on supported platforms.

Salt length is not at most 16 characters, but at least 8 characters

Fix cli tool to handle variable length salts