improve Windows command prompt template

Mappings for the Windows command prompt mapped the bright colours to
shades of light/dark, which resulted in weird looking applications.
This new mapping respects the bright colours, and mostly uses the same
colours for the dark and light versions, because the colour schemes do
not have dark and light versions of the colours.

The mapping is optimised for the Solarized scheme. For example, 0F in
Solarized maps perfectly to the purple/pink of cmd, but 0F in other
schemes looks more brown. Brown-ish colours could be more suitable for
the dark red colour of cmd, but Solarized 0F would look stange when
used as dark red. I think this mapping is a good compromise.
Added new scheme called shapeshifter
Create termite template for both dark/light
Add template for vconsole

I found that the script for shell is not working very well with vconsole
for linux. This should be a more robust solution to set colors for the
consoles limited by only 16 colors and no fancy escape codes.
Adjust colors for light theme
Use magenta instead of brown for light theme
Fix colors, black/white should be same as bg/fg
added template files for Prism
Merge pull request #86 from atelierbram/prism

added template files for Prism
added 5 colorschemes
Use same colors as iTerm2 light theme
Use more readable grey

Also same as iTerm2, so should work with most themes with a light
version
Update README.md
Merge pull request #81 from tybenz/master

New scheme - Shapeshifter
Set bold foreground color
Update vim.erb

Remove duplicate
Merge pull request #89 from alexeyten/patch-1

Remove duplicate condition
Add mix, shade & tint functions

Use these in color schemes for some automatic bright & dark versions. They will
even stay in-theme, since the functions will use the theme's defined darkest and
brightest colors.

Shout out to the [Sass](http://sass-lang.com/) & [Bourbon](http://bourbon.io)
projects for the code!
Ensure the results of mix() are integers
Initial Konsole template

Uses the tint function to brighten every color