add backtrace to warn and info
shorten warn & info backtrace to only show the calling function
update warn backtrace offsets since 8b9a38d
pkg2 wip: use VersionSets instead of plain vectors of intervals.
pkg2 wip: requirements => all fixed requirements scrubbed of fixed.
fix #2982, fix #2983, some issues with macroexpanding type expressions
Merge branch 'master' of github.com:JuliaLang/julia
Merge pull request #2953 from JuliaLang/jn/warninfo_backtrace

add backtrace to warn and info
Add anchor to top of page
Updated package listing, now with 154 packages
pkg2 wip: factor out `satisfies` predicate; dependency filtering.
Merge branch 'master' of github.com:JuliaLang/julia
Improve diag method for CholmodFactor, clean up somewhat
Fix function signature mentioned in #2901
Added logdet method for a Cholesky factorization and its test.
Change `abs(z) > 2` to `abs2(z) > 4` for 3x speedup

As discussed [here](https://github.com/JuliaLang/julia/pull/2974#issuecomment-17240009)
Merge pull request #2985 from karbarcca/patch-1

Change `abs(z) > 2` to `abs2(z) > 4` for 3x speedup