Remove confusing wording in README.md

See: https://github.com/aFarkas/html5shiv/commit/7c26bba0f22a5069ed3d1c28edc0615cab203b39#commitcomment-3859539
Merge pull request #118 from drzax/patch-2

Remove confusing wording in README.md
Supports tag names with hyphens like foo-bar.
Merge pull request #124 from bitovi/master

Supports tag names with hyphens like foo-bar.
ignore more files in bower.json
Merge pull request #127 from kidwm/master

ignore more files in bower.json
3.7.0 (fixes Issue #125)
do not shiv vml elements (fixes issue #131 , thx @byronmcg)
do not ignore bower.json in bower config (fixes issue #129)
Add support for namespaced tagNames (e.g. foo:bar)
Update regex of createDocumentFragment
Update to smaller regex to allow for '-' and ':' in tags, update printshiv as well.
Fixed spelling mistake
Merge pull request #136 from daiscog/patch-1

Fixed spelling mistake
Update to even smaller regex.
Update to even smaller regex for printshiv
Merge pull request #135 from imjoshdean/master

Supports tag names with colons like foo:bar
Merge pull request #1 from aFarkas/master

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