Add SKIP_INSTALL to auxiliary target types

Specify the ARCHS manually for iOS targets

Support ARM 64-bit architecture

Don’t timestamp in Debug, Profile and Test configurations

always generate Debug symbols

In order to symbolicate crashes, we need to keep the dSYMs around.
Even or especially from Release builds. This commits enables generation
of debug symbols for all targets & configurations.
http://stackoverflow.com/a/12827463/206393 looks like a good read on
this topic.

sort build options alphabetically so it's easier
to spot duplicates.
Also document them individually.

Debug symbols are disabled in Release builds by default,
but should be enabled for (iOS-)static libraries,
so the symbols end up in the app's dSYMs

Look for user headers in the project folder first

This reverts commit 0017753c.

This avoids conflicts when all libraries dump their headers into the build folder.

Don't warn about weak refs

fix warning not recognized in recent Xcode

Seems the trailing semicolon confuses Xcode 5,
as the setting which has it and the following
one are somewhat misinterpreted. With the
semicolon they're only applied to Debug / Release
configuration but not to the other. Removing
the semicolon fixes that.

Update Common.xcconfig with warnings suggested by Xcode5

* add warnings now enabled by default on new projects
* add new warning flags

Some of the new warnings are enabled by YES_ERROR in Xcode 5,
but unfortunately this resolves to NO in Xcode 4.x. But as we have enabled
-Werror by default, this should not matter.

remove semicolons only present on those lines

Zero out entitlements

CC @joshaber

Disable ALWAYS_SEARCH_USER_PATHS

Added uninstalled products header search path to iOS.

Use rpath for OS X frameworks and applications

Signed-off-by: Aron Cedercrantz <aron@cedercrantz.se>