improve HOW_TO_BUILD.md (typcn#402)

HOW_TO_BUILD.md

@@ -2,33 +2,36 @@
 
 * OS X 10.10
 * Git
-* XCode 6
+* Xcode 6
 
 # Download Sources
 
 	brew install git-lfs
+	git lfs install
 	git clone https://github.com/typcn/bilibili-mac-client.git
+	cd bilibili-mac-client/
 	git submodule update --init
+
+# Open Project in Xcode
+
+Open `VideoPolymer.xcworkspace` with Xcode.
+
+Note: Do not just open `bilibili.xcodeproj`. It is incomplete.
 
 # Change code signing
 
-If you don't have code signing , please set signing to "None"
+If you don't have code signing, please set signing to “None”.
 
 # Change bundle id
 
-Project Navigator -> Bilibili -> Change com.typcn to others
+Project Navigator -> Bilibili: Change “com.typcn” to others.
 
-# About the video quality
+# Build
 
-Debug build is using html5 playurl api, you can only play low quality videos.
+Select “bilibili” as the active scheme at the upper left corner of the Xcode window. Then click “build”. The app will start automatically.
 
-If you need play high quality video , just build with Release mode, dynamic video parser will load into memory.
-
-# About libraries
+# About the video quality
 
-If you can't download libraries from git-lfs, please run following commands.
+In Debug build, HTML5 playurl API is used. You can only play low quality videos.
 
-	cd bilibili/libs/
-	rm -rf *.dylib
-	wget http://7xkd32.dl1.z0.glb.clouddn.com/bilibili/libs/2.zip
-	unzip 2.zip
+If you need play high quality video, just build with Release mode. Dynamic video parser will be loaded into memory.