Set LANG to UTF-8 in Launch Agent property list

As noted in the `pbcopy` man page, in the absence of a LANG environment
variable setting, `pbcopy` uses the standard C encoding. UTF-8, however,
is recommended. As this seems a reasonable default, let's stick it in
the property list.

Fixes:

  https://wincent.com/issues/2119

Signed-off-by: Wincent Colaiuta <win@wincent.com>
Work around (hopefully temporary) Amazon SSL cert problems

Temporary hack to enable uploading the 0.2 release, which would
otherwise be prevented by these warnings:

  aws put s3.wincent.com/clipper/releases/clipper-$VERSION.zip clipper-$VERSION.zip
  curl: (60) SSL certificate problem: Invalid certificate chain
  More details here: http://curl.haxx.se/docs/sslcerts.html

  curl performs SSL certificate verification by default, using a "bundle"
  of Certificate Authority (CA) public keys (CA certs). If the default
  bundle file isn't adequate, you can specify an alternate file
  using the --cacert option.
  If this HTTPS server uses a certificate signed by a CA represented in
  the bundle, the certificate verification probably failed due to a
  problem with the certificate (it might be expired, or the name might
  not match the domain name in the URL).
  If you'd like to turn off curl's verification of the certificate, use
  the -k (or --insecure) option.

Signed-off-by: Wincent Colaiuta <win@wincent.com>
Update changelog with 0.2 release details

Signed-off-by: Wincent Colaiuta <win@wincent.com>
Add a troubleshooting section to the docs

Signed-off-by: Wincent Colaiuta <win@wincent.com>