Add encrypt support with SQLCipher

.gitignore

@@ -1,2 +1,23 @@
-YTKKeyValueStore.xcodeproj/xcuserdata/
-YTKKeyValueStore.xcodeproj/project.xcworkspace/xcuserdata/
+build/
+!default.pbxuser
+*.mode1v3
+!default.mode1v3
+*.mode2v3
+!default.mode2v3
+!default.perspectivev3
+xcuserdata
+*.xccheckout
+*.moved-aside
+DerivedData
+*.hmap
+*.ipa
+*.xcuserstate
+
+Thumbs.db
+*.swp
+*.pbxuser
+*.perspective
+*.perspectivev3
+*.xcodeproj/xcuserdata/
+*.xcodeproj/project.xcworkspace/xcuserdata/
+.DS_Store

Podfile

@@ -0,0 +1,7 @@
+
+# Uncomment this line to define a global platform for your project
+# platform :ios, "6.0"
+
+target "YTKKeyValueStore" do
+  pod 'FMDB/SQLCipher', '~> 2.5.0'
+end

Podfile.lock

@@ -0,0 +1,19 @@
+PODS:
+  - FMDB/common (2.5)
+  - FMDB/SQLCipher (2.5):
+    - FMDB/common
+    - SQLCipher
+  - SQLCipher (3.1.0):
+    - SQLCipher/standard (= 3.1.0)
+  - SQLCipher/common (3.1.0)
+  - SQLCipher/standard (3.1.0):
+    - SQLCipher/common
+
+DEPENDENCIES:
+  - FMDB/SQLCipher (~> 2.5.0)
+
+SPEC CHECKSUMS:
+  FMDB: 96e8f1bcc1329e269330f99770ad4285d9003e52
+  SQLCipher: c44fcca49c31483c2489cfb79aa7a69407f3794a
+
+COCOAPODS: 0.37.1