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Compatibility with R2.14, and no persistent modifs

- dynamic assign of the "run" function is replaced with a variable list of
 arguments management of run (Closes #3434511).
- modifcations of vpz conditions are no more persistent when calling the run
 function. Now, a backup of previous values are restored. Instead, a function
 "default", with the same signature, provides the functionnality of performing
 persistent modifications (Closes #3507837)
Set multiple values settings as member functions

Multiple condition values settings are now member functions of class "Rvle".
They are prefixed with a point in order to specify sort of private functions.
Generalisation of config and OO view setting

- Configuration is generalised into the setDefault function, (default
  condition values, experiment config output plugins)
- functions setDefault and run have the same signature (the first one is
  persistent, the seconfd one allow local changes)
- a backup process is provided in case of errors.
- The setOutputPlugin function is now available via setDefault
  function (Closes #3301023)
- Tests are fixed for the new version: test on formals are removed.
fix man pages and add NAMESPACE

- add the default NAMESPACE file for R package
- add/remove man pages and fix the aliases
- no more WARNINGS appear on R CMD check
fix the location of deletetion of modules

this bug was related to the pyvle bug ID #3313030.
The same behavior of run methods was observed.
Update documentation and remove asserts

- documentation is updated (Closes #2868966)
- assert in cpp removed
- use same arguments names in code and doc
fix setting outputplugin in handlConfig

Wrong structure was indexed to get view name
fix error management on single simulation

if a single simulation returns an error message, run methods
now avoid affecting the message to the output list.
fix examples in man pages

examples require the existence of a package 'mypkg' and cannot be
simulated during the check operation. Thus errors were reported.
Examples are commented.
fix backup process and add getDefault function.

- errors in the backup process lead to a wrong behavior
of the run function
- the function getDefault is added in order to get the
value of a default setting.
fix man pages and function signatures

the most of warnings on check and install are suppressed
Fix compatibility with vle1.1:

- Compatibility with vle 1.1.
- Fix bug fixes for the Rvle class API.
- Complex data are now converted between vle and R.
- Experiment plan can be expressed into data frames (setting 'inputs').
Replace old vle.conf

- replace old vle.conf of VLE_HOME
- avoid warning by using normalizePath
Fix coding style and DESCRIPTION file

- DESCRIPTION file is reset.
- Coding style is modified.
- Some useless comments are removed.
Fix rvle initialization

- Initialization vle::Init is required to be a global object.
- Use .onLoad, .onUnload functions rather than deprecated .First.Lib
- Remove useless library(rvle) into tests