Rewritten get*Missing*Index functions. Now no need to allocate
memory
each time these functions are called.
* src/BitfieldMan.{h, cc}
* test/BitfieldManTest.cc
* src/array_fun.h
* test/array_funTest.cc
Now BitfieldMan::countBlock() returns BitfieldMan::blocks.
Added new BitfieldMan::countFilteredBlock() to get the number of
blocks
filtered. Removed unnecessary cast to int32_t.
* src/BitfieldMan.{h, cc}
Tatsuhiro Tsujikawa