Libification.

Jekxyl is now a vendor/top-namespace, where libraries are located in
Library/Jekxyl/. We have two libraries for now: Jekxyl\Builder and
Jekxyl\Post. Binaries are located in Bin/ and the application is located
in Application/ containing the In/ and Out/ directories.
Merge pull request #1 from Hywan/libification

Libification.