Changed const char* -> string in most of wpilibc.

The HAL will remain untouched in order to maintain C-style
compatibility. A few places in wpilibc were left as
C-style strings, especially if special formatting (eg,
elaborate uses of snprintf or sscanf) was being used.

In general, const char* was changed to std::string.
character buffers used for formatting were either
untouched, changed to std::stringstream, or changed
to std::string, depending on what was done with
the buffer.

Change-Id: I5e431ddf1cc4d9a6d534e1f21b16ea23be26e7f1

wpilibc/wpilibC++/src/Commands/WaitUntilCommand.cpp

@@ -19,7 +19,7 @@ WaitUntilCommand::WaitUntilCommand(double time)
   m_time = time;
 }
 
-WaitUntilCommand::WaitUntilCommand(const char *name, double time)
+WaitUntilCommand::WaitUntilCommand(const std::string &name, double time)
     : Command(name, time) {
   m_time = time;
 }