Merge pull request #555 from ISA-tools/DomRefactorTabLoader

Refactor isatab loader

Author: proccaserra

isatools/isatab/load/__init__.py

@@ -1,3 +1,8 @@
-from isatools.isatab.load.read import read_investigation_file, read_tfile
 from isatools.isatab.load.ProcessSequenceFactory import ProcessSequenceFactory, preprocess
-from isatools.isatab.load.core import load, merge_study_with_assay_tables, load_table
+from isatools.isatab.load.core import (
+    load,
+    merge_study_with_assay_tables,
+    load_table,
+    read_investigation_file,
+    read_tfile
+)