Significant changes

Fix a grave bug that can make it impossible to open the audio stream. This can happen under somewhat random conditions, though it seems more likely to happen in 32-bit mode. Closes #14.
Fix a grave bug that made FlexASIO-provided timing information unusable. The timestamps and sample counts reported by FlexASIO were completely corrupted, potentially causing erratic behaviour in host applications. Closes #9.
FlexASIO will now log to a text file, instead of requiring the use of a debugger to get the logs. Closes #5. See the README for details.
Redirect the PortAudio debug output to the FlexASIO log. Closes #4.
Add FlexASIOTest, a command-line self-test utility to help testing and troubleshooting FlexASIO. Closes #7. See the README for details.

Minor changes

Romove the Microsoft Visual C++ redistributable installers that were introduced in 0.2; go back to shipping the MSVC runtime DLLs directly to address the reboot issue in #12.
Fix a bug where FlexASIO would violate the ASIO specification by not zero-filling the reserved fields in timing-related data structures.
Make FlexASIO behaviour more similar to the canonical ASIO SDK example by not setting the speed field in timing-related data structures.
Increase the resolution of timestamps that are reported to the ASIO host application.
FlexASIO log lines now include a precise ISO 8601 timestamp. This might make it easier to troubleshoot performance or timing-related issues.
Include detailed FlexASIO build information, PortAudio build information, and host process information in the FlexASIO log.
FlexASIO log lines now include the Process ID and Thread ID. This makes it easier to understand the log in context and to troubleshoot race conditions.
Include version metadata in .dll and .exe file (can be seen in e.g. the "Details" tab on file properties).
Install the 64-bit (x64) and 32-bit (x86) binaries in different subfolders to make it easier to bundle dependent DLLs.
Ship PDB files with the installer to make it possible for end users to get proper thread stacks.
Remove version information from registry.

Built from commit d42407f with Visual Studio 2017 15.8.7, Visual C++ runtime 14.15.26706, ASIO SDK 2.3.1, PortAudio pa_stable_v190600_20161030.