add 5 ddo examples on new data folder, root of proj

[paulo-ocean]

Fixes #78 .

Changes proposed in this PR:

• created new 'data' folder at the root level with 5 DDO jsons

[bogdanfazakas]

LGTM

Not sure if needed or if it can help us later testing but, It might be helpful to have one DDO that demonstrates the use of the dispenser with free prices, and another DDO that also uses a different template ID (1).