help: All high&low risk robots & high score info

The section on high and low risk robots now covers robots of all themes.
Anthills, cows, eggs, mice, spills, stormclouds were all previously
missing. The information is now in table form, to improve concision and
reduce repetition. Information on viewing high scores has been added.

https://bugzilla.gnome.org/show_bug.cgi?id=665833
help: Reordered & formatted table of game types

The game types are now listed in the order in which they appear in the
preferences dialog; the previous order appeared to have no particular
pattern. The table has been reformatted to correspond better with the
formatting of other tables in GNOME Games.

https://bugzilla.gnome.org/show_bug.cgi?id=665833
help: Changed key info for staying & reformatted

The key for staying in place has been edited to "Begin" (i.e. without
numlock activated) to match all other key descriptions e.g. "PgUp", with
a note that some keyboards only show "5" on this key. Table reformatted.

https://bugzilla.gnome.org/show_bug.cgi?id=665833
help: Fixed spacing of appearance patch

Commit message of original patch:
The themes not previously documented (anthills, cows, eggs, mice,
spills, stormclouds, toasters) have been added to the list of themes
available.

https://bugzilla.gnome.org/show_bug.cgi?id=665833
help: Fixed spaces of basics patch & added alt-text

Commit message of original patch:
An instruction for starting a new game from the toolbar with accompanying
image has been included.

https://bugzilla.gnome.org/show_bug.cgi?id=665833
help: Fixed spacing of controls-default & added alt-text

Commit message of original patch:
The key for staying in place has been edited to "Begin" (i.e. without
numlock activated) to match all other key descriptions e.g. "PgUp", with
a note that some keyboards only show "5" on this key. Table reformatted

https://bugzilla.gnome.org/show_bug.cgi?id=665833
help: Fixed spacing of game-types patch

Commit message of original patch:
The game types are now listed in the order in which they appear in the
preferences dialog; the previous order appeared to have no particular
pattern. The table has been reformatted to correspond better with the
formatting of other tables in GNOME Games.

https://bugzilla.gnome.org/show_bug.cgi?id=665833