[vim] Add BufSmartOpen to open header/source files + fix expand tab issue when reloading .vimrc + show expand tab errors in statusline warning
[vim] Cleanup BufSmartOpen
[bin] Fix trap issue (sh only) in download/upload scripts
[env] _fsed makes backup, change _find extension separator to ';'
[env] ctags can now search filenames (:tag filename)