Fixed GetLogEntries

This fixes #1 
- Removed "LogLevel", "Channel" and "Message from LogEntry(Light)
- Added "LastPos" and "FileSize" to LogEntry
- Changed how Timestamps get parsed in LogEntry
- Removed "timestamp" and "comparator" from QueryRunner, since they can't be used anymore
- Updated GetLogEntries + Documentation

If you found any Code-Style issues, let me know and I will fix it :smiley: 
```cs
_qRunner.GetLogEntries(1, 2)
```
Will result in the following command: ```logview lines=1 begin_pos=2 instance=0 reverse=0```
And as response i got ```last_pos=0 file_size=1247756 l=20\n\rerror id=0 msg=ok\n\r```

This will then result in an ```System.FormatException```:
![logentry_l35](https://cloud.githubusercontent.com/assets/1107939/3488985/2080d99e-0510-11e4-999f-9e71c9799a68.png)