plugin updates

YouCompleteMe @ 8ad40442

-Subproject commit 3e748deaece9cba9b6bb222dddb65a62dfe1eb30
+Subproject commit 8ad4044203b9f0a64f238445734fb874936fdc80

airline @ d0652caf

-Subproject commit 1dc8eac3d232bdcc7941deb47f300ac79e344873
+Subproject commit d0652caf69bf5f7da84b52ec4d5cf12984ba56b0

syntastic @ 8f97e64c

-Subproject commit d445e18fe10a4e06c25ff396a4e9d57a3bc20032
+Subproject commit 8f97e64c78e9ade6cf09fc5d5446f5d2a8deaa35

vim-go @ 065d7146

-Subproject commit 8f3d83fc0ad1c4deaf5cb26aff373d0e8a1a0f18
+Subproject commit 065d71460df091eca4ed54056fdc075f0dd5dbf3

vimtex @ 86719efb

-Subproject commit d28e8f672a84540468ca3e489fc148a564757892
+Subproject commit 86719efbdc0f5f222995bc2e47a5b49ed6bf2ae9

vimrc

@@ -93,6 +93,7 @@ inoremap   <Up>        <C-o>gk
 nnoremap   <Down>      gj
 nnoremap   <Up>        gk
 
+let g:loaded_nerd_tree = 1
 execute pathogen#infect()
 
 colorscheme molokai
@@ -108,7 +109,7 @@ let g:SuperTabDefaultCompletionType = "context"
 let g:SuperTabClosePreviewOnPopupClose = 1
 set omnifunc=syntaxcomplete#Complete
 set foldmethod=syntax
-"set foldlevelstart=1
+set foldlevelstart=3
 let g:syntastic_cpp_compiler_options = ' -std=c++11'
 let g:syntastic_python_python_exec = '/usr/bin/python3'
 let g:airline#extensions#tabline#enabled = 1