Greatly updated BF1942 scraper:
 * Teams now exist
 * Bot Names & Teams are known at the beginning
 * New RconClient interface & BF1942 implementation

scraper-common
 * New PlayerManager class to manage players across scrapping methods
 * Moved the many copy'n'pasted implementations for sending TransportMessages to new common MessageUtil class.

all:
 * Switched Charsets to use StandardCharsets instead of string constants