decision: fix the plugin clearance

the data structures storing many items are cleared when leaving the
plugin.
(closes #73)
decision: uncomment the ack function signature

In a order to provide more flexibility, the modeling plugin does not
comment anymore the parameters of the acknowlegment signature.
(closes #69)
all: update CMakeLists with WITH_WARNINGS option

handle the WITH_WARNINGS option provided bby the cmd line given
into vle.conf.
all: replace Gtksourceviewmm with Gtksourceview

Since VLE 1.1.0-beta5, GVLE requires only Gtksourceview, not the
Gtksourceviewmm.
README: update
all: put the duration and begin into conditions

The duration and begin are now part of a condition. The vpz of vle
packages are updated in order to take into account this new feature.
all: make use of the new cmake features

Using VleUtilsConfig.cmake, dynamics are built and linked
to pkgs that are declared directly into the cpp file.
vle.examples: fix generator dynamic building

On win32, the targets order must be respected for the ompiling process
(GeneratorWrapper must be the last target). Otherwise some symbols are not
found.
all: fix the VleUtilsConfig.cmake filesi

- CMAKE_HOME_WIN32 is not a cmake usefull variable (use WIN32 instead)
- search for *.a libraries for packages dependencies
- fix vle libs path for package dependencies
all: fix VleUtils scripts and fix vle.forrester

- definition prefix in VleCheckPackage did not take into account the
possibility to have module version into package dependencies.
- vle.forrester was not linked to ext.muparser
README: update
switch to VLE 1.3
Add a build script
all: switch from Gtkmm2 to Gtkmm3
vle.forrester: fix the flow dialog
fix profiling/LotkaVolterra.vpz model

The name of the package for the dynamic used was wrong.

(cherry picked from commit cf4e8d04d3f5e3f9f41bee60745ec4eca878d8cf)
all: fix string comparison in CMakeLists.txt

Keyword EQUAL was used to check the CMAKE_BUILD_TYPE value and that did not
work. It is now replaced by STREQUAL.

(cherry picked from commit 89b2c22547b61b2adce4883cd3fa2cb1a567f60c)
differential-equation: add output_period parameter

Output of variables was performed at each time step of integration.
To reduce the number of outputs, the parameter output_period (default to 1)
allows to perform outputs every output_period integration steps.

(cherry picked from commit 78f5a2594cc00083c654c3bae7db29905b0c83b0)
diff-equ: remove PDF from source tree

(cherry picked from commit 3c73883cf3327f4efa44204a048783e0de527838)
diff-equ: add vle.output in build depends

(cherry picked from commit b5ea5cba98959179e855878a9fe7b5914415a42f)

Conflicts:
	vle.extension.differential-equation/Description.txt