Delete duplicate code
Remove warn-chaining
Merge pull request #1095 from mtopolnik/delete-dup

Delete duplicate code in core/main
Merge pull request #1094 from mtopolnik/remove-warn-chaining

Consider removing warn-chaining
Simplify signature of start-server
Reorder defns as needed to compile
Remove unused fn args
For :headless just call start-server
Fixes #1093
Merge pull request #1098 from mtopolnik/fix-1095

Fix for Issue #1095
update-in: simplify splitting of args
Fix repl test.
Correcting typos in docs

It's no longer newnew.
Merge pull request #1100 from josephwilk/doc-typos

Correcting typos in docs
Allow ":" as root path for update-in
Remove diagnostic println
Make slurp-resource 2.0.0-compatible again

closes #1102
Merge pull request #1101 from technomancy/improve-update-in

Allow ":" as root path for update-in
Change line endings for `lein new` on Windows.

Fixes #1061.

This also incorporates the new environment variable
LEIN_NEW_UNIX_NEWLINES, for people who prefer to have '\n' as their
newline on non-unix operating systems.
Add guard rails for `lein new` newline handling.