Volt fix clear when render
[Volt] Fix cache path save without /
Unit tests updated
Request update
Merge pull request #2260 from Cinderella-Man/2.0.0-request-issues

[2.0.0] Http\Request updates
Supported \Phaclon\Db\Index: TYPE for 2.0
Updated unit-tests Database Foreign Key
Fixed unit-tests/TagTest.php to pass
add default value as in 1.3 and documentation
Merge branch '2.0.0' of https://github.com/phalcon/cphalcon into 2.0.0
Merge pull request #2465 from ovr/volt_fixes

[2.0.0] Volt fixes
Acls fix + styling + generation issues fixes
var_dump removed
Loops fixed
Flags updated to be booleans
Fix zephir generate View error

Error: Zephir\CompilerException: Cannot read variable 'cache_mode'
because it wasn't declared in
/home/vagrant/cphalcon-2.x.x/phalcon/mvc/view.zep on line 608
Fix zephir Generate libmemcached errors

Error: Zephir\CompilerException: Variable 'servers' cannot be read
because it's not initialized in
/home/vagrant/cphalcon-2.x.x/phalcon/session/adapter/libmemcached.zep on
line 87
Implement functions in \Phalcon\Mvc\Dispatcher class.

- Dispatcher->getPreviousControllerName();
- Dispatcher->getPreviousActionName();

Required by unit-test\DispatcherMvcTest.php on line 194 & 197

I "copied" code from cphalcon-1.3.1

Methodology:
- set variables in \Phalcon\Dispatcher->forward function
- implements getters in \Phalcon\Mvc\Dispatcher
Update view.zep

Zephir\CompilerException: Cannot read variable 'cache_mode' because it wasn't declared in /home/ikhrustalev/Desktop/work/cphalcon/phalcon/mvc/view.zep on line 608

	   if cache_mode {
	-----------------^
Update libmemcached.zep

Zephir\CompilerException: Variable 'servers' cannot be read because it's not initialized in /home/ikhrustalev/Desktop/work/cphalcon/phalcon/session/adapter/libmemcached.zep on line 87

	   ["servers": servers, "client": client, "prefix": prefix]
	----------------------^