add var for default align + add support for aligning at index 0
fix a couple typos
merge in upstream master
add config support for default delims

if there are no configured delims for the current filetype, allow the
default delims to be defined by a global setting since c style comment
delims are not always the best defaults for everyone.
only use g:NERDDefaultDelims if no filetype has been set
Merge branch 'pr/24'