Won't compile due to misspelled includes

In Settings.h lines 39 and 40 both have the wrong case in the file name.

They are:
```
#include "TimeNTP.h"
#include "TimeStr.h"
```

They should be:
```
#include "timeNTP.h"
#include "timeStr.h"

```

Similarly, line 9 in timeStr.cpp is:

`#include "timeLib.h"`

but should be:

`#include "TimeLib.h"`