Bit7z v2.1

Changes from v2.0:

• Added support to multi-volume archives (e.g. Archive.part42.rar or Archive.7z.042) .
• Introduced support to operation callbacks
• Improved code reuse
• Updated and improved code documentation
• Other fixes and improvements

Built using MSVC 2015 (both x86 and x64, with /MD[d] or with /MT[d] flag) 👇