[yarpscope] Set connection persistenceType to END_WITH_TO_PORT
[yarpscope] Read "rows" and "columns" from xml
[yarpscope] Read "persistent" from XML
[yarpscope] Rename variables
[yarpscope] Rows and columns should be >= 1
[yarpscope] Resize the table if rows or columns are declared
[yarpscope] Fix example and relative documentation
[yarpscope] Update docs
[yarpscope] do not set a default context
[yarpscope] Check deprecated options at the beginning

Before parsing the rest of the command line.
[yarpscope] Enable passing --persistent and --no-persistent in simple mode
[yarpscope] Handle persistent flag
[yarpscope] Fix some comments