Remove the index field on the parameter class.
There is no need for the index field in a MAVlink parameter, except during transmission.
Warning message for when  trying to refresh the parameters without a connection.
Renaming to keep the app consistent.
Addind a parameter file reader
Adding a parameter open Dialog.
Cleaning the code.
Fix the parameter name check
Check the parameters name when adding them to the table.
A better menu layout.
Cleaning unused fields
New super class for dialogs that open files.
Make the vallidate parameter text more restrictive.
Using the super class in the Open Mission Dialog
Refactoring some methods on FileManager class.
Organizing the code structure
Subdividing the FileManager class.
Fix a small problem in the Parameter Reader
Merge pull request #104 from arthurbenemann/issue86_param_file

This code has the read from file option. And also a lot improvement on the files/dialog structure.

Closes #86