add pointer to thread discussing adding betas to CI; also include pointers to sample Travis config for go11.1beta3, and a sample CircleCI config for a matrix build in CircleCI 2.0 (though would like to find a better go-specific CircleCI example)
make it slightly clearer that the discussion around possible additional forms of declarations of incompatibilities are only possible avenues / not set in stone
remove text that asserted v1 and v2 of a module are different modules (not sure that's true, but in any event likely clearer to talk about different packages; was hold-over text from several months ago when this was the 'vgo user guide' wiki)
attempt to simplify the intro concepts discussion on modules, go.mod, with more pointers to encourage people to read the proposal and official doc; also move the older (and perhaps somewhat confusing to a newcomer) v2+ discussion to live in the semantic versioning section. (Overall, much of text touched here was hold-over from several months ago when this was the 'vgo user guide' wiki)
add faq on what do when project has historically made breaking changes without bumping the major version (answer currently references recent k8s comment from rsc)
added Table of Contents (slightly odd placement of TOC in an attempt to keep 'Current Status' section or at least its heading above the fold); tweaked my list of post-vgo-proposal changes
flip the order of the two options for creating a /v2+ module. (I've seen predictions that the /v2+ directory-based approach will be less common, though I guess we'll see what the future brings)
small tweak to 'full module path' examples to make it slightly easier to scan (e.g., changed 'pkg1' -> 'pkg' given there are already many numbers in the example)
moved older text about allowing a v1 module to be implemented in terms of its v2 replacement to the 'Major Versions' section, and some small related edits to 'Major Versions' section
briefly introduce MVS, but point to the proposal and initial vgo blog series for details; mention the latest version is selected for new direct dependencies; add some additional pointers; remove the 'for now' from the section on semantic import versioning (I'm guessing that was written a while ago); other minor text cleanup
