#106 Uptade transmission to v4.00

[Roberto Ribes]

This is a major release, both in numbering and in effort! It's been in active development for over a year and has a huge list of changes -- over a thousand commits -- since Transmission 3.00. Some of the highlights include:

Resource Efficiency - Use less memory and fewer CPU cycles
Better Community - Pull requests welcomed and used
Code Modernization - Migrated from C90 to modern C++
New Features - What would a major release be without them?