How-to on forced translation with Marian

Code and documentation on how to do forced translation with Marian is now available! This functionality aims to support users in improving translation quality by injecting translations from their own bilingual terminology dictionaries. To expand coverage and support morphologically rich languages, it also supports inflecting entries in the bilingual terminology dictionary. A full description of the experiments and subsequent results obtained can be found here, along with the needed scripts and guidelines on how to train a model with forced translation capabilities.