The new `cycle` option allows to cycle between every constaint order
option from `none` to `pi-sign-change`.

w is now a real and follows the rules:

- [0..1]: defines a percentage of limit loop where the kappa is not
  used. For example -p w:0.5 -p limit:100 gives 50 loop without kappa
  computation and 50 with kappa computation.

- > 1: defines a static number of loop without kappa computation. For
  examples -p w:50 -p limit:-1 gives 50 loop without kappa and +oo with
  kappa computation.

The value of each variables in the solution/initial vector is
initialized according to the init-policy-random parameter of the
bernouilli's law:

- 1 use the init-policy algorithm to affect 0 or 1.
- 0 use the toss up algorithm (init-random parameter and the
  bernouilli's law) to affect 0 or 1.

Change the initialization and reinitialization policy of the solution
vector. Values are:

* `bastert`: for each variable (or at `init-random` rate) use cost values to set
  or unset variable.
* `pessimistic-solve`: found a solution for each (or at `init-random` rate)
  constraints. For soft constraints, affect one to strict minimum variables.
* `optimistic-solve`: found a solution for each (or or `init-random` rate)
  constraints. For soft constraints, affect one to the maximum variables that
  valid the constraint.
* `cycle` (default): Only for the optimization mode, start with the
  `pessimistic-solve` mode and change to `bastert` then `pessimistic-solve`
  mode. The change between mode is done if and only if three times, optimization
  fails to improve the current solution.

The VERSION_TWEAK is removed from version name. It's useless for this
little project.

To improve the use in command line interface, graphical user interface
or R, we replace, only for computation output (ex.: remaining
constraint message, new solution found, etc.), the output message
stream using private functions debug(ctx, ...), info(ctx, ...),
warning(ctx, ...)  interface with callback mechanism in the
baryonyx::context class. (Closes: #28)

Replace specific Linux/Unix source code about color
in (pseudo)terminal with the fmt::text_style and fmt::terminal_color
enumeration.

Reported on MacOS.

Baryonyx permits to run benchmark on a set of problems described in a
csv files. This option is available using the --bench [name] option
and csv files. All Baryonyx parameters are available to perform the
benchmark.

For example:
baryonyx --bench bx-0.3 -pdelta:0.01 -ptime-limit:60 spp.csv

The benchmark mode generates a new spp-new.csv file with results of
computation. The csv format is:

file optimum status cplex lsp bx-0.2 (1)
cplex:
lsp:    (2)
bx-0.2:
scp410 optimum 514 514 514 804 (3)
scp41 optimum 429 429 429 627
scp42 optimum 512 512 512 934

(1) The header: three columns mandatory (file, optimum, status) and
    one solver per column. In this example, cplex, local solver and
    baryonyx 0.2.

(2) The description part: one line per solver to describe version and
    parameter for example.

(3) Finally, one line per solve: model name (with or without
    extension), status (optimum/feasible), best solution found and
    solver’s solution. inf can be use to indicate no solution found.

In benchmark directory, some files are provided and a script to
download classical problem.

Without this option, we can not choose pnm or file observation.