Add text constants to layout_controller

Fixes #40
ISSUE-112 ajax links in admin should not contain &amp;
add phpStorm stuff
ISSUE-98 Admin Action Classes

re-fix incoming page to remove extension
Merge pull request #50 from texdc/40_admin_layout_controller

Add text constants to layout_controller
HTML clean-up
Merge pull request #52 from texdc/40_admin_layout_controller

HTML clean-up
Merge pull request #64 from zencart/v160

zc 160