Subtle colors for line numbers
Merge pull request #2 from tamagokun/patch-1

Subtle colors for line numbers
Migrate base syntax groups to color variables

This covers all of the stuff under `:help w18`.  The UI chrome parts will be
harder, as there's a lot more one-offs and this function-calling style makes
those a bit more difficult.

The colors for the Nomral group will now toggle white/black based on the value
of &background.  Note that for `&background == 'dark'` it will use regular white
on a darker black background and when light will use lighter black on regular
white.

The GUI colors for `Constant` and linked groups were varying shades of
darkgreen, instead of the yellow they were grouped under, while the cterm values
were still darkyellow.  I have set these to the shade of dark yellow I chose for
the iTerm version of pencil, for the sake of consistency.  Changing these would
be easy, so long as they are consistent.
align color definitions

- a few of them weren't really defined correctly across gui/cterm
- using color names for cterm is unreliable; better to use codes
reorder uichrome based on `:help hitest.vim`
Visual, VisualNOS, fix blues & add light grey

I had the alignments of blue/dark blue/light blue wrong :/
Converted easy UI Chrome colors to variables

Mostly greys, but some yellow as well.
Merge pull request #3 from mattly/light-dark-switch

Programmifiying the colors
More color consolidation to variables

- Color Alignments with iterm theme / internally
- the gui and cterm colors were out of alignment in a number of places.
  I typically opted for one or the other and plan to reconcile with variables.
complete light/dark toggle
v0.2, dark background

this commit, also fixed colors for signs and foldcolum
indicate serif fonts; better author reference
Make colors more subtle
fixed minor syntax issue for gui colors
html/markdown: improve highlighting
darken color for QuickFix line number

This shouldn't be subtle, as it's not passive information like normal
line numbers
add option for higher-contrast ui elements

because for me, the existing colors were very difficult to see.  Enable
with:

let g:pencil_higher_contrast_ui = 1
Fix spelling for 'grey' -> 'gray'

Can't believe I did that.
added reference to new vim-textobj-sentence
added mention of sibling project vim-wheel