transmute moved to std::mem
to_base64 returns StrBuf now
Merge pull request #59 from ebfe/fix-transmute

transmute moved to std::mem
Merge pull request #60 from ebfe/base64-strbuf

to_base64 returns StrBuf now
Update rust-crypto-util now that libgetopt has been updated to use StrBuf instances
Merge pull request #61 from DaGenix/fix-test-tool

Update rust-crypto-util now that libgetopt has been updated to use StrBuf instances
Replace ~str with StrBuf
Merge pull request #62 from ebfe/strbuf

Replace ~str with StrBuf