Improved the readme

The current readme suffered from several grammar mistakes which detracted from important information. I cleaned up the grammar and added some more information where needed.
Replace more addresses with their named constants

Also named window.var_4B2/4 as saved_view_x/y
add news window
Adding more possible locations for config.c
Removing dupe address, adding OS hour and minute
add load saved game
Implementing get_local_time()
fix news window multiple copies bug
remove key debug check
Removing leftover debug code
add checksum validation for load sc6 and sv6
name more functions in editor.c
Adding peep thought types
add unknown map element function
add play intro config setting
Fixed spelling in peep thought types
Labelled more peep offsets
Added PEEP_NAUSEA_TOLERANCE enum
add guest list window
Adding item flags, time in thought struct