- Implementation of bookmark, unbookmark and rollback procedures.
- Minor changes.

- New implementation of watcher lists.

New implementation of a software floating point implementation (sdbl) for consistency across different platforms and compilers.
Removing useless files and compile time options related to variable activity data type (it can only be sdbl).

Expose all options to command line.
Expose search statistics to users.

- Adding a compile time option to use floats for var activity (now it can be either ‘double’, ‘float’ or ‘unsigned’ (default))
- Adding vector of ‘float’
- Adding an option to configure the ratio of learnt clauses to be kept in clause database at each reduction (0 means no reduction).
- Other small changes.

The command is ‘satoko’

Small typos and variables renaming.

xSAT is an experimental SAT Solver based on Glucose v3(see Glucose copyrights below) and ABC C version of
MiniSat (bsat) developed by Niklas Sorensson and modified by Alan Mishchenko. It’s development has reached
sufficient maturity to be committed in ABC, but still in a beta state.

TODO:
* Read compressed CNF files.
* Study the use of floating point for variables and clauses activity.
* Better documentation.
* Improve verbose messages.
* Expose parameters for tuning.