added precompiled header

git-svn-id: http://svn.miranda-ng.org/main/trunk@3700 1316c22d-e87f-b044-9b9b-93d7a3e3ba9c
removed not used headers

git-svn-id: http://svn.miranda-ng.org/main/trunk@3701 1316c22d-e87f-b044-9b9b-93d7a3e3ba9c