Fix Xcode 5 warnings.
Merge pull request #102 from wlue/master

Fix Xcode 5 warnings.
Fix only building active arch in debug.
Merge pull request #119 from square/kve/fix-building-only-active-arch-for-debug

Fix only building active arch in debug.
Kill Xcode 5.1 warnings
Link libicucore.dylib with -L to avoid 3 warnings
Remove unused function log_queue
Merge pull request #153 from square/federman/kill_warnings

Kill Xcode 5.1 warnings
Use Apple's provided base64 implementation.
Merge pull request #160 from square/kve/kve/RI-3784

[Master] Use Apple's provided base64 implementation.
Fix size conversion warnings.
Merge pull request #162 from square/alanf/fix-size-conversion-warnings

Fix size conversion warnings.

Reviewed by @firestone.
merged with latest upstream