Add composer and assets

Conflicts:
	app/classes/PostParser.php
charset popup header fix

Conflicts:
	htdocs/Skin/s1/skin_global.php
bug: tags.css doesn't include
upd: css files are replaced with same scss
add: monolog support
upd: adjucting monolog to forum needs
upd: configuration subsystem
add: unit tests
add: Variables helper
add: shell commands interpreter
fix: fixes after merge
upd: revert some changes and clean up configs
add: some documentation
doc: add notice about conf_global.php
Merge pull request #150 from Jureth/upstream

composer и все-все-все