Minor updates to 1.2.4

Metadata Wizard tweaks by Curtis Price (06112014)
-Built "clean" tbx file using ArcGIS 10.1 (saved as 10.0) to avoid
double tool display
-Various tweaks to USGS_MetadataTool.py to improve maintainability
-Modified validation code in tbx:
--create working folder in user TEMP (not C:\temp)
--modified validation to use type "Folder" not "Workspace" for metadata
working folder
--If folder is not available, standard ArcGIS error message is displayed
fixed curly quotes in README file
README file
Revert "README file"

This reverts commit 8f5c4b7951cb4da0ada543bed1460f38ff9ce604.
Revert "Revert "README file""

This reverts commit 9361628efa5b668145cd4f9f64eaedd29f6a9b1b.
Revert "fixed curly quotes in README file"

This reverts commit 4a66300bcc77738334b578377eb458a99265fd24.
renamed readme to README.md
Revert "renamed readme to README.md"

This reverts commit c537329da38949f54486569adeacf4c1f954f36f.
fix to README.md
fix to README.md
Revert "renamed readme to README.md"

This reverts commit c537329da38949f54486569adeacf4c1f954f36f.

Conflicts:
	README.md
delete old README.MD
add new README.md
fixed header on README.md
readme.md formatting
more README.md formatting
more README formatting
README update describing my changes
README.md edit
readme.md edit