init commit
refactor code
unfinished work
unfinished work
add test aidl
add example house
update readme
init owlery implementation
implement owlery
Merge pull request #1 from zhchang/refactor

Refactor
add proper initialization of House and Owlery
Merge pull request #2 from zhchang/refactor

add proper initialization of House and Owlery
add requestHelp for teachers.
add owl news implementation
Enable List interface
add parcelhelper
cleanup question structure. debug prcel helper
enhance parcel helper
correct parcel helper implementation
add write/read listmap for parcelhelper