v1.1.0

User visible changes:

• Fix a bug in urlize that would remove periods
• custom tag syntax (like {% and %}) was made Environment-specific internally. Previously they were global even though you set them through the Environment.
• Remove aggressive optimization that only emitted loop variables when uses. It introduced several bugs and didn't really improve perf.
• Support the regular expression syntax like /foo/g.
• The replace filter can take a regex as the first argument
• The call tag was implemented
• for tags can now take an else clause
• The cycler object now exposes the current item as the current property
• The chokidar library was updated and should fix various issues

Dev changes:

• Test coverage now available via istanbul. Will automatically display after running tests.