New sensor and target for Applied Energistics

Provides these details:
Stored items, GridIndex, Used/Free Item-Types, Item-Count and Bytes.
Imports cleanup
Validity checks & only return data if powered

Also puts the items in the map using the InventoryHelper,
so the Items table can be used in the same way as the one
from the inventory sensor.
Compatibility with official api, removed gridindex

Oupsi. I used a BON version at first, then switched to the official
API - wasn't able to find it before. Anyhow, it does not allow
getting the grid index from IGridInterface, so i had to remove that.
Applied Energistics Developer API rv7.a

Can be downloaded from the bottom of that page:
http://ae-mod.info/Downloads/
AE Card registration, recipe and language
Textures for AE Sensor Card
Merge pull request #106 from thraaawn/master

Sensor for Applied Energistics