Do not print the total computing time at the end of the driver.

This permits some simplifications.

This would only hit for mfs=2 or mfs=3.

By the way, use camel case for the function name.

Ref. dynare#1717

Since bef537d4, constant equations were not
simplified as soon as they had a tag attached.

But this is too wide a restriction. In particular, this breaks the trend
component models which have a target that is set to a constant.

So we now only skip the replacement in the case where there is an “mcp” tag.

Ref. dynare#1697

This was only adding unneeded complexity, for no clear reason (we’re very far
from reaching 2³¹ equations, and if we wanted to support models that large, it
would be better to use long integers to avoid being limited to 2³²).

Rather use DataTree::Zero, since we use numerical zero for static and
contemporanous Jacobians.

— return output arguments on the left-hand side
— do not pass class members as input/output arguments

By the way, fix a (benign) vector allocation bug in
{Static,Dynamic}Model::computeChainRuleJacobian().

Add missing smoother options to shock_decomposition

See merge request !18

modify Julia output for mapping eqidx

See merge request !17

This is necessary to correctly compute those original model leads/lags. In
particular, this is needed for correct interaction with “histval”.

Closes: #47

Provide M_ as an output to stoch_simul and discretionary_policy

See merge request !15

Related to dynare#1711

Create new EquationTags class to simplify use of equation tags throughout the code and avoid repeated code

issue #38

- by default, set the value of the variable to `1`, as is done on the command line with the `-D` flag

issue #43