Vim Configuration updates

- Add more configs to make VIM a lot more like an IDE.
- Removed unnecessary configs.
- Collapsed some settings together.
- Split configs to facilitate NVIM migration.
- Added spell files to git.
- Added .swp VIM files to gitignore.
- Configured NVIM to pick VIM selected configurations.

common/.vim/key_maps.vim

@@ -0,0 +1,50 @@
+" Disable left, right, up and down keys
+" In normal mode...
+nnoremap <Left>  :echoe "Use h"<CR>
+nnoremap <Right> :echoe "Use l"<CR>
+nnoremap <Up>    :echoe "Use k"<CR>
+nnoremap <Down>  :echoe "Use j"<CR>
+" ...and in insert mode
+inoremap <Left>  <ESC>:echoe "Use h"<CR>
+inoremap <Right> <ESC>:echoe "Use l"<CR>
+inoremap <Up>    <ESC>:echoe "Use k"<CR>
+inoremap <Down>  <ESC>:echoe "Use j"<CR>
+
+" Unbind some useless/annoying default key bindings.
+nmap Q <Nop>
+
+" Center the cursor when moving through document
+nnoremap <C-d> <C-d>zz
+nnoremap <C-u> <C-u>zz
+nnoremap g; g;zz
+nnoremap g, g,zz
+nnoremap <C-o> <C-o>zz
+nnoremap <C-i> <C-i>zz
+nnoremap ]s ]szz
+nnoremap n nzzzv
+nnoremap N Nzzzv
+
+" Better window/split navigation
+map <C-j> <C-w>j
+map <C-k> <C-w>k
+map <C-h> <C-w>h
+map <C-l> <C-w>l
+
+" Clear searches
+nnoremap <Leader>/ :call clearmatches()<CR>:noh<CR>
+
+" Make space-bar the leader-key
+let mapleader = " "
+
+" Map easymotion Plugin to <Leader>j
+map <leader>j <Plug>(easymotion-s)
+
+" Map nerdtree to <Leader>e
+" Changes the pwd and opens the VCS root
+nnoremap <leader>e :lcd %:h<CR> :NERDTreeToggleVCS<CR>
+let g:NERDTreeShowHidden = 1
+let g:NERDTreeWinSize = 20
+
+" Changes the pwd to the opened file's directory
+nnoremap <leader>cd :lcd %:h<CR>
+