remove ie8 code path
use document.head
add format tests
ie9 is slow

if delay is too low on undo-manager, ie will fail to coalesce because
it's too slow
define bullet type
add bullet to toolbar + demo
simplify pullBlocks
Merge branch 'develop' into lists
pullBlocks allow ul/li existence + tests
document/lines recognize li as line
gitignore only meant for relative to cwd
add line iterator and tests
add tests for bullets
add mergeNodes helper and tests
Compute next lineNode on next() call

Allow for manipulation of next lineNode before next() call
Fix bugs due to lineNodes changing while iterating

Switch from LineIterator to simpler utility function
add selection tests and fix for bullet
add bullet to demos
no need to rely on execcommand for line formats
add lists