Fix the array diff.

array_diff_assoc() reads like it first does an array_diff() (which
compares the values) followed by an array_diff_key()...  I'm not sure,
but I digress. In any case, the related section of code should not be
taking the values into consideration at all.
Add alterable breadcrumbs.
Add context for ease of use.
Merge pull request #148 from jordandukart/7.x-alter-breadcrumbs

Add alterable breadcrumbs.
Merge remote-tracking branch 'origin/7.x' into 7.x-fix-array-diff

Conflicts:
	includes/admin.inc
Change logic for determiniation of dismax availability.

No longer depends on submission of "Solr index" form.
Merge pull request #150 from adam-vessey/7.x-fix-dismax-detection

Change logic for determiniation of dismax availability.
Merge pull request #128 from adam-vessey/7.x-fix-array-diff

Fix the array diff.
Status would've been slightly off.
Merge pull request #151 from adam-vessey/7.x-fix-feature-status

Status would've been off.
Spelling.
Merge pull request #153 from jordandukart/7.x-spelling

Spelling.