Update boot.red

Added 		"(not yet implemented)"
		; 
as actiondescription where action is not yet implemented.
Added a simple description for complement.

Result in compiled console:
red>> help action!
    make        => Returns a new value made from a spec for that value's type.
    reflect     => Returns internal details about a value via reflection.
    form        => Returns a user-friendly string representation of a value.
    mold        => Returns a source format string representation of a value.
    absolute    => (not yet implemented)
    add => Returns the sum of the two values.
    divide      => Returns the quotient of two values.
    multiply    => Returns the product of two values.
    negate      => Returns the opposite (additive inverse) value.
    power       => (not yet implemented)
    remainder   => (not yet implemented)
    round       => (not yet implemented)
    subtract    => Returns the difference between two values.
    even?       => Returns true if the number is evenly divisible by 2.
    odd?        => Returns true if the number has a remainder of 1 when divided
by 2.
    complement  => Returns the opposite (complementing) value of the input value
.
    append      => Inserts value(s) at series tail; returns series head.
    at  => Returns a series at a given index.
    back        => Returns a series at the previous index.
    clear       => Removes series values from current index to tail; returns new
 tail.
    copy        => Returns a copy of a non-scalar value.
    find        => Returns the series where a value is found, or NONE.
    skip        => Returns the series relative to the current index.
    tail        => Returns a series at the index after its last value.
    head        => Returns a series at its first index.
    head?       => Returns true if a series is at its first index.
    index?      => Returns the current series index, relative to the head.
    insert      => Inserts value(s) at series index; returns series head.
    length?     => Returns the number of values in the series, from the current
index to the tail.
    next        => Returns a series at the next index.
    pick        => Returns the series value at a given index.
    poke        => Replaces the series value at a given index, and returns the n
ew value.
    remove      => Returns the series at the same index after removing a value.
    select      => Find a value in a series and return the next value, or NONE.
    tail?       => Returns true if a series is past its last value.
red>>