Implement Binary.Chars for URI.Info
Adding String.contains?
Detect whether a string contains another string.
Merge pull request #1185 from meh/uri-to_binary

Implement Binary.Chars for URI.Info
Bring system.ex back to bootstrap. Closes #1155
Merge pull request #1183 from alco/system-bootstrap

Bring system.ex back to bootstrap
Added -v --version option to all elixir commands.

Fixes #1178
Merge pull request #1181 from jjh42/add-version-option

Added -v --version option to all elixir commands.
:binary.match supports a list of matches
Ensure --cookie is set before remsh starts, closes #1190
Clean up DocTestTest
Add support for direct dependencies of umbrella
Add deps to 'mix new --umbrella'
Merge pull request #1186 from ericmj/mix-umbrella-deps

Add support for direct dependencies of umbrella project
Merge pull request #1188 from josephwilk/string-contains

Adding String.contains?
Update CHANGELOG
Document super and add more docs to defoverridable
Merge pull request #1193 from ericmj/docs-overridable

Document `super` and add more docs to `defoverridable`
Fix minor compile-time warnings
Fix edge cases for starts_with?, ends_with? and contains?
Refactor String.ends_with?

Using :binary.match should save us an allocation. Plus, the function
now looks more similar to starts_with?