add habitat fields back into Samples model
add surface relief coverage partial to samples view
add biotic cover sand  partial to samples view
add biotic cover hardbottom partial to samples view
add habitat info to sample form, with section
added substrate section stuff to app.css
added substrate section js back into sample.js.erb
added model validations back into samples model
added substrate info back into sample.xlsx export
added substrate info back into samples proofing_pdf
fixed allowing user to go to species if raleif height changed and not valid
Merge branch 'HabitatToFish'