API parameters consistency

[rgiot]

In the same kind of cosmetic stuff as issue #30, there are also inconsistencies in the parameter orders of some methods.

For example, in the Graph class:

  bool applyAlgorithm(const std::string &algorithm, std::string &errorMessage,
                      DataSet *dataSet = NULL, PluginProgress *progress = NULL);

  bool applyPropertyAlgorithm(const std::string &algorithm, PropertyInterface *result,
                              std::string &errorMessage, PluginProgress *progress = NULL,
                              DataSet *parameters = NULL);

where:

• parameters and progress are exchanged
• parameters is named dataSet in the first case

I guess we can find others cases

[p-mary]

Thanks for your input.
This issue is now fixed (commit f7a3162).