Remove previously generated beams before installing new ones
Documented File.stat options
Merge pull request #2783 from bbense/documentation-tweaks

Documented File.stat options
Improve stat docs
Add MIX_ENV output to archive.build
Report correct location if local.hex failed
Bump Hex requirement
Add copy_path! instead of read_path!(..., file: ...)
Test the way System.cmd finds for executables
Change implementation of System.cmd to match the docs
:gen_event_EXIT can only be successful reasons for process handlers
Remove :elixir module from stacktraces
Also remove elixir_exp from stacktraces
Fix compiler warning
Merge pull request #2792 from jwarwick/stream_warning

Fix compiler warning
Merge pull request #2789 from alco/system-cmd-path-resolution

System.cmd path resolution
Do not pass false into port command
Merge pull request #2782 from pedrosnk/master

Remove previously generated beams before installing new ones
Merge pull request #2787 from elixir-lang/emj-hex-file-error

Report correct location if local.hex failed
Move printing out of copy_path, always create dir