added css for ref. upload form
delete unused module import
dummy upload form for reference alignment
experimental stuff on preloaded alignment files
male delete alignment more robust
loaded mapping support in mapping_vocab_sources/4
assert uploaded alignment as being of type amalgame:LoadedMapping
do not assert status amalgame:imported on preloaded graphs
ADDED: collect reference alignments from multiple graphs that are marked as amalgame:reference in the given Strategy
use all corrpespondences returned by reference_mappings/2 when counting reference statistics, not only manual ones created in amalgame
give new manual evaluation graphs also status amalgame:reference
added status option amalgame:reference to user interface
paint reference graphs dark green in the strategy graph
link to graph list after uploading reference graph