Change references to GNU C extension's "typeof" to more ISO C friendly
"__typeof__."
Quiesce warning about string literals having a 4095 char maximum.
Merge commit '5c28dc36f4348ca29500e90059446c90f7f95318'

* commit '5c28dc36f4348ca29500e90059446c90f7f95318': (88 commits)
  Updated the version number in `1PasswordExtension.podspec`
  3x and PDF icons and corrected designations
  The instruction is clearer now
  Added the import `OnePasswordExtension.h` step in the README
  Removed extra `}` in the README
  Updated the README.
  [IMPROVED] Consolidated imports.
  Better alert title
  Fixed the password change alert in ACME.
  Updated the version number
  Updated the README
  Removed the ability to change usernames from `changePasswordForLoginForURLString`
  Added support to send the a username when changing passwords.
  Removing the section from change password.
  Updated the README
  Added comments
  Improved the change password method
  Added useful comment about password generation options
  Updated the code snippets in the README
  Updated the podspec version number
  ...

Conflicts:
	OnePasswordExtension.m
Fix errors in 1Password.xcassets.

 * Assign @3x images in XCAsset.
 * Fix bug from e59ae1eca7fd508649aae4394fcc316fc1a1dbd4 where filenames
   were changed but references in the 1Password.xcasset were not.
 * Remove unused iPad @3x image to quiesce warning.
Add missing newline (regression since 8be3915e3b6dbe4c9d763fb3d66fa41131729e13)
Fixed grammar issue in `failedToContactExtensionErrorWithActivityError:`
Replaced all occurenced of "1Password App Extension" with "1Password Extension"
Merge pull request #108 from gfiumara/master

Correct errors in 1Password.xcasset since 1.0.9
Merge pull request #111 from AgileBits/task/fix-grammar-issue-in-failedToContactExtensionErrorWithActivityError

Fixed grammar issue in `failedToContactExtensionErrorWithActivityError:`
Replaced `typeof` with `__typeof__` in `OnePasswordExtension.m`

This should resolve #124.

**Note to self:** Once this PR is merged we need to "cherrypick" the changes to the `add-low-level-api` branch
Merge pull request #125 from AgileBits/task/fix-typeofs

Replaced `typeof` with `__typeof__` in `OnePasswordExtension.m`
Fix clang warning about trailing semicolons.

Warning shows up with -Wsemicolon-before-method-body enabled.
Fix clang warning about shadowing local variables.

Warning shows up with -Wshadow enabled.