Sandcat Browser v5.1-beta.2

This release is focused on stability and performance, as well as some other improvements such as being able to ignore certificate errors while navigating and open PDF files.

Here is what changed in version 5.1:

• Switched to the WACEF Chromium framework and the latest Chromium binaries. This significantly improves speed and stability, especially during shutdown.
• Most preferences now get applied instantly (just need to open a new tab instead of restarting).
• Added a certificate error dialog.
• Added a PDF viewer plugin.
• Added proxy support.
• Improved Lua integration.
• Minor compiler optimizations.
• The Selenite library was upgraded to the latest release.