Handle items under the player on level arrival and generally

[zenzombie]

Fixes #214

The only breaking change is the removal of HAS_ITEM in the player placement logic of startLevel in RogueMain. The other changes passed regression testing against the release branch.

[tmewett]

Can you describe the changes? Looks like there are some appearance changes

[zenzombie]

Yes there are appearance changes. Below is from the changes file.

I'll try to post some screenshots and I'll fix the conflicts.

• Fixed a bug where arriving on a level with items "obstructing" the stairs would cause the player to be moved to a non-item location without using a turn.
• When the player arrives on a level and occupies a location with an item, a message is now displayed in the message pane.
• If the player occupies a location with an item, the item is now shown in the sidebar. Additionally, the item is included in the description when inspecting the player's location.
• When inspecting a location, item descriptions now include details if space permits.

[zenzombie]

Player is standing on a sword (OLD)

Player is standing on a sword (NEW)

Player arrives on a level with food at the stairs (OLD)

Player arrives on a level with food at the stairs (NEW)

[tmewett]

Ah sorry, I think I misread some code - and I missed the change file! Thanks for the extra details, LGTM