Add tentacled starspawn to the abyss

With placeholder rarity for now for testing, feel free to adjust later.
Whitespace and formatting fixes.
Add wording and punctuation fixes.
Fix a crash when a tentacled starspawn gets displaced in the Abyss.
Android: automatically build signed package if ant.properties is present.
Re-add parts of ring of flight's description.

Being unable to re-evoke the ring is a rather crucial piece of information.
Updates for .pl item descs.
Add a new-developer instruction.
A formatting fix.
Don't claim summons with MF_HARD_RESET are durable.

They would get both (summoned) and (durably summoned), and time out.
Make enslaved starspawns stop constricting.
Use "evoked" instead of "invoked" in ring of flight desc
Don't let monsters drop huge stacks of unbranded ammo for a single branded piece

Also don't compare pluses, since they don't exist any more.
Don't let monsters equip amulets of inaccuracy

Since they have magical knowledge of the properties of all other
equipment, there's no real excuse for them picking up inacc. Probably
monsters should only wear amulets that they can actually use, anyway
(rage, ?).
Fix/remove some ungrammatical speech lines
Split Enchantments into Hexes and Charms

Player ghost speech was behind the times! Charms only has one speech
line now, though.
Don't let Stealth skill inhibit monster shouting.

Stealth should stop monsters from noticing you, not from shouting after they
do notice you. The shouting chance is now fixed at what it was with 6 Stealth
skill previously (80% chance).
Have monsters lose clairvoyance on the player's location if you reenter a level via new stairs.

Previously, even if you exited a level and reentered it using a different staircase, monsters could still retain knowledge of exactly where you were on the level for a considerable number of turns (100+), which sometimes led to the odd situation of a whole pack making a bee line for your new location on the other side of the map.

Monsters will now also lose tracking on other monsters they're targeting, if those monsters get teleported across the level.
Don't let player teleports shake off monsters when under Ashenzari wrath

Normally, Ash wrath prevents monsters from ever forgetting the player's location, but teleporting was a single (likely unintentional) exception that still caused them to forget you like normal.
Fix whitespace.