Update release_notes.md

Author: neurosutton

docs/release_notes.md

@@ -1,9 +1,9 @@
-0.1.7
-###Documentation
+1.0.3_6.0
+### Documentation
 - Add docs + release_notes.md
-###Enhancements
+### Enhancements
 - Upgrade to FSL 6.0
 - Add flexible standard template
-###Fixes
+### Fixes
 - Highpass filter cutoff variable now consistent
-- Changed REG_STANDARD_IMAGE default to yes
+- Changed REG_STANDARD_IMAGE default to yes