Fixed typos in Mix.Deps.Retriever docs
Erlang release for Elixir should use start.boot instead of elixir.boot
Continue checking first for a mixfile before a rebarconfig
Check the key on register_attribute
Allow -boot start to be overriden on releases
Raise an error when Dict/Set doesn't support the target
Merge pull request #1403 from devinus/raise-on-unsupported-dictset

Raise an error when Dict/Set doesn't support the target
Fixed doc typos in Mix.Tasks.Deps.*
Fixed doc typos in Mix
Fixed doc typos in Mix.Archive
Fixed typos in Mix.Deps. Updated error strings in test cases
Merge pull request #1406 from jwarwick/mix_typos

Fixed typos in various Mix modules
MAKE: allow more verbose build output

people can now run:
  make Q=
to get a the maximum of build output
MAKE: standardize install variables

- convert to autotools-like variables commonly used in build scripts
- respect DESTDIR (used for temporary install locations)
- fix symlink logic to work with DESTDIR
${foo##bar} is posix, see:
http://pubs.opengroup.org/onlinepubs/9699919799/utilities/V3_chap02.html
under "2.6.2 Parameter Expansion"
- quote all variables that can contain whitespace
(make does not take care of that!)
MAKE: respect LIBDIR variable

Some distributions do not use plain "lib", rather "lib64"
and "lib32". Allow to control this variable.
Merge pull request #1407 from gentoo/Makefile

Makefile improvements
Delete files in the manifest instead of removing the loadpath
Merge pull request #1408 from meh/mix-leex-yecc

Delete files in the manifest instead of removing the loadpath
Ensure eval callbacks gets a fresh vars dict
Simplify manifest API and put tests back on green