readConstantPool: constants.c

1. Allocate space (gc_malloc) for tags and data, elements of  _constants, which used in Hjava_lang_Class to access constant pool.
2. Read and set up the constant pool info.
3. Perform some constant pool optimisations to allow for the use of pre-compiled classes.

readClass: readClass.c

1. Read in class info.
2. readConstantPool
3. Add class to the system, ADDCLASS, a macro defined in readClassConfig.h which will call setupClass
4. readInterfaces
5. readFields
6. readMethods
7. readAttributes