Plugin API for Far Manager 3.0 build 3190

git-svn-id: http://farmanager.com/svn/trunk@9634 72235d2c-c60c-0410-a47a-a0032694dc5d
add more error checking

git-svn-id: http://farmanager.com/svn/trunk@9635 72235d2c-c60c-0410-a47a-a0032694dc5d
Cmdline.PromptSize in far::config

git-svn-id: http://farmanager.com/svn/trunk@9636 72235d2c-c60c-0410-a47a-a0032694dc5d
fix

git-svn-id: http://farmanager.com/svn/trunk@9638 72235d2c-c60c-0410-a47a-a0032694dc5d