Merge pull request #4 from dingquanyu/multimer-dataloader

created Multimer dataloader and datamodule classes

tests/test_data/alignments/5kc1_A/mgnify_hits.sto

+# STOCKHOLM 1.0
+
+#=GS MGYP000596977035/1-183  DE [subseq from] PL=00 UP=0 BIOMES=1000000000000
+#=GS MGYP000476752113/14-133 DE [subseq from] PL=00 UP=1 BIOMES=1000000000000
+
+query                           MSTLAEVYTIIEDAEQECRKGDFTNAKAKYQEAIEVLGPQNENLSQNKLSSDVTQAIDLLKQDITAKIQELELLIEKQSSEENNIGMVNNNMLIGSVILNNKSPINGISNARNWDNPAYQ-DTLSPINDPLLMSILNRLQFNLNNDIQLKT-EGGKNSKNSEMKINLRLEQFKKELVLYEQKKFKEYGMKIDEITKENKK
+MGYP000596977035/1-183          -------------------------------------------MSQNKLSSDVTQAIDLLKQDITAKIQELELLIEKQSSEENNIGMVNNNMLIGSVILNNKSPINGISNARNWDNPAYQ-DTLSPINDPLLMSILNRLQFNLNNDIQLKT-EGGKNSKNSEMKINLRLEQFKKELVLYEQKKFKEYGMKIDEITKENKK
+MGYP000476752113/14-133         ----------------------------------------------------------------------------------------------------------SLAKTRSWDNSRNMGSGLGSSSDPLLISILGKLQSNLINSISEQCKEDPQVLKELDGRIAQQFSQFRKELALYEQKKSKDYNARLEQAIAENKK
+#=GC RF                         xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx.xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx.xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
+
+query                           LANEIGRLRERWDSLVESAKQRRDKQKN
+MGYP000596977035/1-183          LANEIGRLRERWDSLVESAKQRRDKQKN
+MGYP000476752113/14-133         LSNQILKLRGRWDSLVESAKQRRSRQ--
+#=GC RF                         xxxxxxxxxxxxxxxxxxxxxxxxxxxx
+//