Revert "used short {#blocks}"

This reverts commit 935b22f113037861345f1092c30f798a4fc39064.
UserManager: added constants for table and column names
UserManager: added PASSWORD_MAX_LENGTH (DDoS attack prevention)
{include block} without #
typos
Database: SelectionFactory renamed to Context
updated template
updated netteForms.js & jQuery
removed DI\Container magic accessors
welcome page uses inline images
UserManager: calculateHash() refactored and renamed to hashPassword(), added verifyPassword()
UserManager: fixed blowfish for PHP >= 5.3.7
Adminer: added message "Adminer is available only from localhost"
updated composer.json
Composer: Updated to Nette 2.1.x
Merge branch 'v2.1' of https://github.com/nette/sandbox.git

Conflicts:
	app/templates/@layout.latte
	app/templates/Homepage/default.latte
	composer.json
	readme.md