fix(flatland monokai): change the line highlight color to mach the new background

Original Monokai has a warm/brownish line highlight color which matches perfectly the original warm gray background.
However, the Flatland Monokai version has a cold/bluish gray background which makes the highlight_line look out of place with all the blue from the menus.

![Monokai Screenshot](http://imgur.com/qQjT6an.png)

This commit changes the line highlight color to the same as the standard flatland scheme which has a wonderful combination of background + highlight_line.

Result:
![Monokai new Screenshot](http://imgur.com/yLGpplp.png)

Closes #71
Merge pull request #72 from aristidesfl/monokai

fix(flatland monokai): change the line highlight color to mach the new b...
Adding ability to change row height of sidebar trees
Merge pull request #73 from andyalmonte/sidebarTreeSizes

Adding ability to change row height of sidebar trees
Increase brightness of selection in dark color scheme
Add retina images for active tab + tab buttons
Finish upgrade most icons for retina support

See repo https://github.com/rcdilorenzo/flatland-dark-vector-icons
for vector versions.
fix vim colorscheme name.
Merge pull request #78 from tschaub/patch-1

Increase brightness of selection in dark color scheme
Merge pull request #83 from zhuangya/fix_vim_colorscheme_name

fix vim colorscheme name.
Merge pull request #82 from rcdilorenzo/master

Upgrade Icons for Retina Support
pull #78 for vim.
Merge pull request #85 from zhuangya/vim_selection_color

Increase brightness of selection for vim (like issue #78)
Fixed content_margin of tab_control
Merge pull request #87 from takashi/patch-1

Fixed content_margin of tab_control
Reduce left/right margin when close button hidden
Fixed content_margin when file is modified
Merge pull request #88 from takashi/patch-2

Fixed content_margin when file is modified
Add missing open bracket, fixes #89
Convert spaces to tag