added readline() = readline(STDIN)
Merge pull request #3858 from astrieanna/readline

added readline() = readline(STDIN)
versioninfo: thread IO stream to allow capturing output.

Use Pkg2.status() to get info about installed packages.
doc: fix some sphinx warnings
clarify that we use MPFR for BigFloat
slight formatting fix
Pkg2: oops, Pkg2.status() should default to printing to STDOUT.
fix #3852

we were missing variables in call position that might be used Undef
Revert "attempt to fix #3838" to fix #3863

This reverts commit 4095e682ac14ca72d1db2febc9b4cbb19ffb1589.
Fix error message on process error
Merge github.com:JuliaLang/julia