Vim as Python3 and C IDE

This is my shell script to install vim and other packages so that I can use vim as my Python3 and C development environment.

This program will do the following things:

Uninstall previous vim packages and old vim configuration.
Compile and install vim from source with Python3 support.
Download and install 256 color capable urxvt terminal emulator and set it up to use clipboard and the Terminus font. Urxvt is the fastest terminal I found and it supports unicode characters and tabs. Terminus font makes code easier to read.
Install vim plugins Pathogen and Tagbar to make vim an IDE.
Install Syntastic and Pyflakes.
Install Supertab and Pydoc.
Install C language reference documents.
Remove most color schemes that come with vim, leaving only: default, desert, murphy and slate.
Install 256 color vim colorschemes: desert256, distinguished, jellybeans, aldmeris (based on oblivion colorscheme for Gedit).
All colorschemes are modified to show the current line as a 1 pixel underline.
Aldmeris default color for statements (white) is the same as for the rest of text. Statements should stand out, so the color is changed to green.
Colorscheme desert256 is set as the default colorscheme.

After installation you have:

A 256 color and UTF-8 capable terminal emulator urxvt.
Basic copy / paste functionality between urxvt and other programs.
Python3 syntax checking (every time you save).
Python3 syntax highlighting.
Python3 documentation for the keyword under cursor opens with leader + pw ( \pw NOTE second character must be pressed within 1 second ).
C syntax checking (every time you save)
C syntax highlighting.
C reference documentation for the keyword under cursor opens with leader + cr ( \cr NOTE second character must be pressed within 1 second ).
The current line is underlined with a single pixel white line (all colorschemes).
F2 - turns on/off line numbers.
F3 - turns on/off ident guidelines
F5 - turns on/off automatic identation (needs to be turned off when pasting text into vim).
F8 - turns on/off Tagbar.
Tagbar shows your function names and variables in a small window on the right side of vim display.
Tagbar also shows you the 'scope' meaning it highlights the function name the current code line belongs to.
Pressing enter in Tagbar window on a function name makes the main window jump to that function.
Matching brackets are automatically highlighted.
Search results are highlighted.
Case is ignored in search.
Vim remembers the code line that you were in last time the file was open.
'' is mapped to `` meaning that the command '' returns to the line and character you were on before a jump in the text.
Backspace configured to work like it should.

After installation fire up urxvt and start vim in it :)

Copy paste in urxvt works like this: text highlighted in urxvt is immediately copied to clipboard when you release the mouse button. Paste with: shift + ctrl +v.
Copy / paste works between most graphical programs and urxvt, but with for example Gmail it does not work. You can overcome this by installing the small and lightweight clipboard manager: parcellite. As a bonus it remembers your previous clipboard texts also :)