add test for gcc's 128 bit integer extension
fix rankm method for backward search (allow n as parameter)
add compressed HWT variant
add typedef for 128 bit integer if available
fix compilation on gcc 4.1.2
bump version after

  * add check for 128 bit integers
  * add compressed HWT based LF variant
  * fix compilation on gcc 4.1.2
Merge branch 'experimental'