minor improvements and additions

[Stonebank]

While developing bot scripts I figured the following methods were missing. These are ones that I have personally used a lot

Inventory:

1. getItemsContainingName returns all items containing the input string
2. getFirstItemContainingName returns the first item containing the input string

NPCChat:

1. selectOption selects the option corresponding to the option index. So for example, 1 would be option 1 in the dialogue and so on. I thought this was easier than entering the whole string

RSPlayer:

1. Implemented a better "isMoving" boolean, returns true if the last tile is not the same as current or if the local player is moving

Walking:

1. GetRealRunEnergy just divides the getEnergy by 100 to return an easier accessible value.

All of this has been tested throughout, javadoc has also been added.

[Stonebank]

Correction:

getRealRunEnergy is called getEnergyPercentage

Also added:

getWeight returns the player in-game weight hasDepletionActive returns whether depletion is active by using the varbit