added new readXXX methods in Unpacker API
minor change within AbstractPackerTemplate, PackerTemplate and UnpackerTemplate classes
added common template class: AbstractCommonTemplate
added primitive common template classes: BigDecimal, BigInteger, BooleanArray, Boolean, ByteArray, Byte, Character, Date, DoubleArray, Double, FloatArray, Float, IntegerArray, Integer, LongArray, Long, ShortArray, Short
created Template interface
added StringTemplate class