kbd fixes

edit() now works in both dtemu and devkit
minor fix for smooth typing
fixed int(float), more floppy code
float pow support negative exp
floppy still very broken
more floppy code

all parts of floppy support have been implemented - now i should just
get it working (currently not working at all)
Update README.md
floppy fixing
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fixed defines forward references
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Update README.md
fixed error in print

print only printed the first item in print list
i.e. print a, b only printed a
simple autoindent for edit

provides automatically the same level of indent as previous line had
(may work.. may not)
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Update README.md
added key() and getc() functions

int key()
int key(int)
str getc()
fixed multiline commands on prompt
Update README.md
Update README.md