twitter/bootstrap — pull request #3072 by sbermeister (2012-04-15 12:15:53+00:00)
Title: Updated Glyphicons to use v1.6, as well as added a 'grey' coloured set of glyphicons

Updated the glyphicons set to use v1.6, and added a variable to the LESS sheets.

Also added a 'grey', shadowed version of the glyphicons (as well as normal and white), and added an example of it to the docs.

From the Glyphicons changelog to v1.6:
11.04.2012 (All PNG files have been optimized by ImageOptim - http://imageoptim.pornel.net/)
-----------------------------------
GLYPHICONS 1.6
-----------------------------------
New Glyphicons:
filter
gamepad
playing_dices
sampler
web_browser
share
piano
candle
turtle
rabbit
blog
dashboard
certificate
calculator
book_open
iphone_shake
pin_classic
pin_flag
tie
wallet
globe
briefcase
suitcase
thumbs_up
thumbs_down
hand_right
hand_left
hand_up
hand_down
fullscreen
shopping_bag
hdd
nameplate
nameplate_alt
vases
announcement
dumbbell
file_import
file_export
bell
pinterest
dropbox
google+_alt
jolicloud
yahoo
blogger
picasa
amazon
tumblr
wordpress

New Halflings:
hdd
announcement
bell
certificate
thumbs_up
thumbs_down
hand_right
hand_left
hand_up
hand_down
circle_arrow_right
circle_arrow_left
circle_arrow_top
circle_arrow_down
globe
wrench
tasks_progress
filter
briefcase
fullscreen

------------
Changed/fixed icons:
circle_arrow_left
circle_arrow_right
circle_arrow_top
circle_arrow_down
settings
fire
table
message_flag
message_lock
message_new
folder_lock
folder_flag
folder_new
tree_conifer