Imported FlatBuffers headers
Serializer prototypes and FlatBuffer IDL file
Added serialize() implementation
Began scriba ID conversion

Scriba ID type is changed from 64-bit integer to 128-byte UUID
Added scriba_id_zero_init() and scriba_id_to_string() implementation
Added scriba_id_to_blob() and scriba_id_from_blob() implementation
Added new scriba id type support to the library

Library frontend, mock backend, sqlite backend now use new 128-bit
UUID as scriba id.
Serializer does not yet support the new id type.
Added UUID support to serializer
Began adding UUID support to Java bindings
Fixed broken build without unit tests
UUID support in JNI code and Java unit tests
Fixed UUID_to_scriba_id()
Merge branch 'uuid' into serializer
Added company deserialization
Implemented deserialization for all types of entries
Adding entries to local DB with existing IDs during deserialization
Added serializer unit test
Fixed crash in serializer
New serializer tests
Java bindings for serializer