+ Added "Create_List()" and "GCD2()" in "BitVector.c".
+ "new()" now can optionally return a list of bit vectors.
+ "GCD()" now can optionally return the two integer factors
"x" and "y" for the linear combination of its input values
"a" and "b" so that gcd(a,b) = x * a + y * b.
+ Changed the test files "t/01________new.t" and "t/09_parameters.t"
as well as the documentation accordingly.
+ Added a new test file "t/17________gcd.t".
+ Further simplified the error handlers in "Vector.xs", making the
resulting object library file substantially smaller (about 20%!)
and thus faster to load.
+ Fixed missing "\" in regular expression in "t/00____version.t".
+ Overhauled the error handlers in "BitVector.c" and "Vector.xs".
+ Added a demo "examples/test.c" to play around with the C library.
+ Attempted to fix all compiler warnings.
+ Fixed a problem in test "t/01________new.t" with Perl using
64 bit integers; now contains "use integer;" to avoid failure.
+ Synchronized "Carp::Clan" and "ToolBox.h" with "Date::Calc" 5.2.
+ Revealed common method aliases (Or, And, etc.) in the documentation.
+ Fixed GCD(), now GCD(z,0) == GCD(0,z) == z and negative values
are handled correctly.
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