NTSL: Cleanup, Added some functions [MERGEREADY]

General cleanup, removed out-commented code and generalized stuff.

**Added:**
* implode(list, string) -- Opposite of explode
* min(...) -- Returns the lowest number of the arguments
* max(...) -- Returns the highest number of the arguments
* randseed(number) -- Initializes the random generator with a new seed
* rand() -- Returns random float between 0 and 1
* proper(string) -- Returns the string with proper case, first letter uppercase, rest is lowercase. Doesn't check anything fancy like periods and stuff.
* Added $language variable, which returns the language of the person who said the incoming message.