My vimrc

.vimrc

if !has('nvim')
    set nocompatible
endif
set hidden
syntax on
filetype off

set rtp+=~/.vim/bundle/Vundle.vim
call vundle#rc()

" Let Vundle manage Vundle
Bundle 'gmarik/Vundle.vim'

"""Colour scheme"N"
Plugin 'jacoborus/tender'

Bundle 'tpope/vim-sensible'
Bundle 'tpope/vim-surround'
Bundle 'tpope/vim-fugitive'
Bundle 'tpope/vim-sleuth'
Plugin 'vim-airline/vim-airline'
Plugin 'vim-airline/vim-airline-themes'
Bundle 'scrooloose/syntastic'
Bundle 'myint/syntastic-extras'
Bundle 'scrooloose/nerdtree'
Bundle 'jistr/vim-nerdtree-tabs'
Bundle 'kien/ctrlp.vim'
Bundle 'tacahiroy/ctrlp-funky'
Bundle 'rking/ag.vim'
Bundle 'nvie/vim-flake8'
Bundle 'Raimondi/delimitMate'
Plugin 'ntpeters/vim-better-whitespace'
Plugin 'airblade/vim-gitgutter'
Plugin 'scrooloose/nerdcommenter'
Plugin 'Valloric/YouCompleteMe'
Plugin 'terryma/vim-expand-region'

" Enable to copy to clipboard for operations like yank, delete, change and put
" http://stackoverflow.com/questions/20186975/vim-mac-how-to-copy-to-clipboard-without-pbcopy
if has('unnamedplus')
  set clipboard^=unnamed
  set clipboard^=unnamedplus
endif

" This enables us to undo files even if you exit Vim.
if has('persistent_undo')
  set undofile
  set undodir=~/.config/vim/tmp/undo//
endif

" Quick ESC
imap jj <ESC>
" Map leader to Space
let mapleader = "\<Space>"
" Map <leader>w to save file
nnoremap <Leader>w :w<CR>

""" General settings"""
"""""""""""""""""""""""
" set cursor to line
set cursorline
" Convert tabs to spaces
set expandtab
set modelines=0
set clipboard=unnamed
set encoding=utf-8
set wrap
set number
set nowritebackup
set noswapfile
set nobackup
" highlight search result
set hlsearch
set ignorecase
set smartcase
" escape to cancel search
nnoremap <silent> <Esc> :nohlsearch<Bar>:echo<CR>
" remove whitespace on save
autocmd BufWritePre * :%s/\s\+$//e

""" Plugin specific settings"""
"""""""""""""""""""""""""""""""
"airline
let g:airline_left_sep=''
let g:airline_right_sep=''
let g:airline_section_z=''

" NERDTree
" Open NERDTree automatically on startup
autocmd StdinReadPre * let s:std_in=1
autocmd VimEnter * if argc() == 0 && !exists("s:std_in") | NERDTree | endif
" Toggle NERDTree with Ctrl-N
map <C-n> :NERDTreeToggle<CR>

" Ctrl-P
" Make Ctrl-P much faster by using git/silver searcher for autocompletion
" Also ignores files in gitignore
let g:ctrlp_use_caching = 0
if executable('ag')
    set grepprg=ag\ --nogroup\ --nocolor

    let g:ctrlp_user_command = 'ag %s -l --nocolor -g ""'
else
  let g:ctrlp_user_command = ['.git', 'cd %s && git ls-files . -co --exclude-standard', 'find %s -type f']
  let g:ctrlp_prompt_mappings = {
    \ 'AcceptSelection("e")': ['<space>', '<cr>', '<2-LeftMouse>'],
    \ }
endif

" vim-expand-region
" Use v and C-v to increase and decrease region expansion
vmap v <Plug>(expand_region_expand)
vmap <C-v> <Plug>(expand_region_shrink)