Small style improvements
Fix absolute positioning in HTML messages (#1488819)
Fix redundant colon after last address in print mode
Merge branch 'master' of github.com:roundcube/roundcubemail

Conflicts:
	CHANGELOG
Merge branch 'master' of github.com:roundcube/roundcubemail
Moved rcube_* classes to <plugin>/lib/Roundcube for compat. with Roundcube Framework autoloader
Define more (uniquely prefixed) constants for Roundcube directories in order to enhance the interoperability of the Roundcube framework
Use new RCUBE_PLUGINS_DIR constant
Separate framework and application constants
Fix installer to work with the new framework architecture
Merge branch 'master' of github.com:roundcube/roundcubemail
Unify path schema in global constants: paths always end with a /. Keep RCMAIL_CONFIG_DIR for backwards compatibility
Fixed filter selection after filter deletion (#1488832)
Remove unused db_max_length config
Cut dependencies to rcmail class
Merge branch 'master' of github.com:roundcube/roundcubemail
Clarify rcube::get_user_name() usage, add rcube::get_user_email()
Make charset header accessible, too
Cleaner way of handling user password in framework-based programs with no session
Merge branch 'master' of github.com:roundcube/roundcubemail