Improve vimrc to include more information and settings

+ Add more binds, even if left default, for reference or quick adjusting
+ Adjust sourcerer.vim for ultra-black background
+ Set clang_complete to use snippets for code completion in C / C++
+ Set clang_complete binds jump-to declaration and jump-out to + and _ respectively
+ Add information to vimrc to allow adjusting clang options
+ Highlight column 80 on cpp and c files
+ Revert to unicode symbols by default, left powerline symbols commented out for now

.bash_aliases

@@ -22,5 +22,5 @@ export PATH=$PATH:/opt/
 
 # Example path for autocompletion using libclang-9-dev package, obtained by the following command
 # find /usr/ -name libclang.so.1 2>/dev/null
-#export LIBCLANG="/usr/lib/llvm-9/lib/libclang.so.1"
+export LIBCLANG="/usr/lib/llvm-10/lib/libclang.so.1"