added login/logout functions
initial register page, some more util
initial index page and style engine
initial util.js and writePage
transitioning to app.php, initial editPage
updated login to use app
added include to logout
pages using app
editPage update
more changes to editPage
working on fixing pages
fixing cont.
fixed edit page
Merge branch 'features/login_logout'

Conflicts:
	inc/application.php
	inc/database.php
	inc/util.php
	pages/index.php
Added diff_match_patch_php submodule and implemented delta encoding.
Preliminary page_context and page rendering. Merging and delta encoding has issues.

Conflicts:
	inc/application.php
	inc/database.php
	inc/util.php
Updated README text for install/config.