Initial commit: Add MathHomeworkHelper project with web and Android components

MathHomeworkHelper/app/proguard-rules.pro

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+# This is a configuration file for ProGuard.
+# http://proguard.sourceforge.net/index.html#manual/usage.html
+
+-dontusemixedcaseclassnames
+# For using GSON @Expose annotation
+-keepattributes *Annotation*
+
+# Gson specific classes
+-dontwarn sun.misc.**
+-dontwarn com.google.gson.**
+-keep class com.google.gson.** { *; }
+
+# Application classes that will be serialized/deserialized over Gson
+-keep class com.example.mathhomeworkhelper.** { *; }
+
+# Preserve line numbers for debugging stack traces
+-keepattributes SourceFile,LineNumberTable
+-renamesourcefileattribute SourceFile