Revert "Manual update"

This reverts commit a8dbe6bd5219285681870a530d4f449f89b7b6c8.
Changed .julia -> .julia/v0.3
Merge pull request #6806 from JuliaLang/kms/fix_docs

Fix #6575
Implement hash-checking on downloaded dependencies

Dependencies will be checked at extraction-time, and have their checksums stored
in deps/checksums/. The deps/jlchecksum command tests a given filename against the
checksums stored in that file, supporting MD5 and SHA512 checksums for all
recorded files.  SHA512 is preferred, with MD5 available as a fallback in the
case that `shasum` is not available.  If the hashes do not match, an error is
thrown and compilation is halted.  If a file is asked for and no hash has been
given for that file, the hash is generated for both SHA512 and MD5, and stored
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