/**
 * This class is mostly like java.util.BitSet, just a bit more intuitive. Think
 * of it as a mutable string of bits which can grow and shrink in length.
 * 

 * In this class, bits are stored in so called storage units. Depending on your
 * processor type, int or long might be best to use as storage type.
 * 

 * The bits in the storage units have MSb (most significant bit) first bit
 * order. This means that the bit at index 0 in this BitArray is the most
 * significant bit of the first storage unit. For int and long, this is the
 * sign-bit.
 * 

 * This class is not snychronized. If you want to access instances of this class
 * asynchronously from multiple threads, you have to synchronize access in your
 * own code.
 * 
 * So far, this is a beta version. As of today (Sat, 2007-12-31), it's most
 * likely that it still contains bugs.
 */