xmlui: Add new metadata fields to CRP3.7 theme
xmlui: Clean up whitespace in CRP3.7 item-view.xsl

In vim, for tab/space mix:

    :retab

Then in sed, for blank lines with spaces:

    sed -i 's/^[ \t]*$//' dspace/modules/xmlui/src/main/webapp/themes/CRP3.7/lib/xsl/aspect/artifactbrowser/item-view.xsl
input-forms.xml: Remove ILRI forms

We will now use the generic input forms.
input-forms.xml: Use default forms for Nile Basin
news-xmlui.xml: Update welcome page text
input-forms.xml: Add SOCIAL LEARNING subject to ILRI and CCAFS submission forms
xmlui: Update WLE banner
xmlui: Use ";" for author separator in WLE theme
xmlui: Add subject focus for WLE subject

Also update browse and search indexes to use a more descriptive
name.
xmlui: Tweak WLE font sizes/colors a bit