delete rename and goto hotkey and define rename and goto command.

hello. luainspect define F2 rename. rename is great!
but my gvim hotkey F2 already use ":noh" to clean search hignlight.
i recreate rename command and define hotkey in vimrc.

my vimrc define
```VimL
"-----------------------------------------------------------------------------
" plugin - luainspect.vim
"-----------------------------------------------------------------------------
imap <F6> <C-o>:LuaInspectToggle<CR>
nmap <F6>      :LuaInspectToggle<CR>
let g:lua_inspect_warnings = 0
let g:lua_inspect_events = 'CursorHold,CursorHoldI,BufReadPost,BufWritePost'
inoremap <buffer> <silent> <F8> <C-o>:LuaInspectRename<CR>
nnoremap <buffer> <silent> <F8>      :LuaInspectRename<CR>
nnoremap <buffer> <silent> gd :LuaInspectGoto<CR>
```