v0.1.12

• V can finally compile itself on Windows. (https://github.com/vlang/v#mingw-w64)
• os module now uses optionals in all functions that return File. Lots of bugs with optionals fixed.
• println was optimized. It no longer results in allocations. Now it also works correctly with all integer types.
• Lots of vfmt fixes, it will be enabled tomorrow.
• New strings module.
• Lots of other fixes and improvements, thanks to all the contributors.