Squashed 'VRAppSettingsExample/Requirements/VRFoundationToolkit/' changes from be812d2..593add1

593add1 Changed project settings to restrict arm64 architecture, and strip only debugging symbols.
36175d4 Added checking of property class type in - (id)initPropertiesWithCoder:(NSCoder *)aDecoder, value will be assigned if property is kind of values class or nil.
09a2ccd VRURLConnetctionChecker class is added. Checks if apple.com or other url is accessible without downloading data from url. VRENUM_TYPEDEF macro is added. Creates typedef enum construction without utility. Description comment is added to VRPRECONDITIONS_LOG_ERROR_ASSERT_RETURN macro.
14eba02 Merge commit 'da8f4cacfe799faedce7bfad88099d822ef6844e'
fd5ca56 Macros are introduced: VRPRECONDITIONS_...  - checks provided list of conditions, reports error and asserts if one of condition fails. VRENUM_TYPEDEF_AND_UTILS - creates typedef enum { ... } TName; and declares inline functions: isValidTName() for bounds check and NSStringFromTName() to receive string representation of passed value's constant.
99909aa Merge commit 'c4957396a507084240ce32f9ccecb7af9892f40e' as 'VRFoundationToolkit/Requirements/libextobjc'
c495739 Squashed 'VRFoundationToolkit/Requirements/libextobjc/' content from commit ce5ce01
76aa873 Merge commit '96239e5eaefdb244f594189f452edc47d2f413f6'
1a3571e Added NSBundle+VRDisplay name category for fast access to display name.
00f3806 VRLOG_ERROR_ASSERT macro is added that doesn't return from function.
db4a15c Merge commit '47cd2440ec39970cbfb3ad343f0e3e78dbdbe5bf'
56d1ede Added VRLOG_ERROR_ASSERT macro that doesn't return from function.
3c0af9f README.md is updated.
25ae5b7 Merge commit 'd2028e59353a495e62b63f28c84884a123c18313'
3d02601 Turn off console logging by default.
e09ef0b Merge commit 'ac678d06f42be8780d1b754874158bf10cac85c6'
f6f932f VRPerformSelectorUnderProtocolIfPossible macro is corrected.

git-subtree-dir: VRAppSettingsExample/Requirements/VRFoundationToolkit
git-subtree-split: 593add1ce65de81ca290446115efe16b76216133
Merge commit '09490c45cd967177cae77baa4e152c79795a1848'