Remove escape codes which can be handled by external scripts

removes loadavg and time/date escape codes
Move stuff which shouldn't be in source directory
Add warning to readme
add -Wextra and -std=c1x to CFLAGS

plan is to use c11 as it defines 32bit unicode functions (uchar.h)
Makefile.in - remove unused stuff and rename some options
ansi.c - fix declarations initialization
fix implicit utime declaration
Add '-' to set default fore/background color