Document dash to underscore in OptionParser
Make it explicit Regex.run returns all captures in a match
IEx helpers r and c can handle erlang sources
Original clean arguments need to be passed to deps.clean.
Test mix clean with the --all flag.
Merge pull request #1554 from tristanoneil/mix-clean-all

Pass clean arguments to deps.clean
Merge pull request #1552 from ericmj/iex-erlang-helpers

IEx helpers r and c can handle erlang sources
Fix for #1555
Fix regression on do/end blocks, closes #1551
Merge pull request #1556 from derekmcloughlin/issue-1555

Fix for #1555
Remove deprecated code
Reduce the ammount of module binaries being passing around
Add regex pattern support to String.replace
Merge pull request #1557 from meh/string-replace

Add regex pattern support to String.replace
Improve Enum.shuffle and String.replace docs
List.replace_at
Merge pull request #1558 from sasa1977/list_replace_at

List.replace_at
Fix a bug in insert_at adding items to the wrong location with negative indexes
Add Enum.reduce/2 that sets initial value of acc to the first element of collection

Signed-off-by: José Valim <jose.valim@plataformatec.com.br>

Conflicts:
	lib/elixir/lib/enum.ex
Refactor Enum.min/1 and Enum.max/1