Removed some profanity from the docs


git-svn-id: http://svn.code.sf.net/p/nsis/code/NSIS@6519 212acab6-be3b-0410-9dea-997c60f758d6
Added /WX compiler switch (treat warnings as errors)


git-svn-id: http://svn.code.sf.net/p/nsis/code/NSIS@6520 212acab6-be3b-0410-9dea-997c60f758d6