Realm pod install 失败
Installing Realm (1.0.2)
[!] /bin/bash -c
set -e
sh build.sh cocoapods-setup
core is not a symlink. Deleting...
Downloading dependency: core 1.3.1
Downloading core failed:
curl: (56) SSLRead() return error -36
解决方法：
rm -rf Pods，删除工程目录下的pods文件夹，
然后重新 pod install，
安装Realm的时候会慢一些，等了很长时间...解决方法:
curl https://static.realm.io/downloads/core/realm-core-1.0.1.tar.bz2 -O
mkdir $TMPDIR/core_bin
mv realm-core-1.0.1.tar.bz2 $TMPDIR/core_bin
