Merge pull request #6 from simonwhitaker/master

Update for armv7s
Added a library target 'arcosx' for OSX
Prefixed all functions and pointer to functions with tk_ (Tim Kientzle).
This will avoid Apple misinterpreting use of archive_ functions as
private API use, thus avoiding app rejection.
Fixed the example to use tk_ prefix for archive methods.
Merge pull request #7 from amkr/master

A more App Store friendly libarchive
Fixed project file to show .a's in Products folder
Merge pull request #8 from amkr/master

Fixed project file to show .a's in Products folder