Fix regions filter instructions text

Fixes #66
Fixed extraneous zoom extent bug.  Fixes #94
Merge pull request #95 from benjwadams/fix_bbox_zoom_large_extent_bug

Fixed extraneous zoom extent bug.  Fixes #94
Added help tooltips to home page

Implements #69.  Added help text directly to "Services" and "Datasets"
 heading via tooltips.  Moved help text to separate include file in raw text,
 which both the main help and home page now include.

Also fixed capitalization error on
"NGDC Geoportal" and decapitalized "datasets" near end of help text.
Fixes bug in the status update
Merge pull request #98 from ioos/statusbug

Fixes bug in the status update
Merge pull request #97 from benjwadams/add_help_tooltips_to_home_page

Added help tooltips to home page
Merge pull request #93 from benjwadams/fix_region_filter_text

Fix regions filter instructions text
Dataset dropdown populated from active services

Fixes #65 by eliminating dataset asset types with inactive service endpoints
from the selection menu on the datasets page.
Merge pull request #99 from benjwadams/remove_unused_dataset_types

Dataset dropdown populated from active services
Fixes #31 - Adds spinner image over map during transition
Removes "All" from the services drop-down on asset-map
Fixes sizing of the spinner
Merge pull request #100 from ioos/spinner

Fixes #31 - Adds spinner image over map during transition
Adds configurable port to deployment(s)
Fixes #57 by adding responsive select box to services display page
Refactors the javascript code for readability
Adds responsive selection for the dataset dropdown too
Merge pull request #102 from ioos/services

Fixes #57 by adding responsive select box to services display page
Prefer CF, then CDM values for feature types