Uri template support

[adstage-david]

Replacing the dynamic urls via blocks in pr #26.

Some uri template examples:

set_url "/users{/username}" # 1.
set_url "/pages{+slug}" # 2.
set_url "/search{?query*}" # 3.
set_url "/index" # 4.

#1.
Page.new.load(username: 'bob') #=> visit /users/bob
Page.new.load #=> visit /users

#url takes expansions as well:

Page.new.url(username: 'bob') #=> /users/bob

#2.
Page.new.load(slug: '/my/crazy-slug') #=> visit /pages/my/crazy-slug

#3
Page.new.load(query: 'simple') #=> visit /search?query=simple
Page.new.load(query: {color: 'red', text: 'blue'}) #=> visit /search?color=red&text=blue

#4
Page.new.load(query: 'simple') #=> visit /index
Page.new.load(a: 1, b: 2) #=> visit /index

[adstage-david]

I should note I just noticed this one doesn't seem to work - it wants string keys, rather than symbol keys. Possibly a bug in the addressable implementation:

Page.new.load(query: {color: 'red', text: 'blue'})

the stringified keys version should work though (one of the specs in my commit tests this case):

Page.new.load(query: {'color'=> 'red', 'text'=> 'blue'})

[natritmeyer]

Thanks for this! I need to update the README.rb before I release it... I'll try to get to this ASAP...

[natritmeyer]

README.md updated...

[sillylogger]

I was going to try to forge a pull request to this effect tonight. Thanks!

What are your thoughts on taking the hash in the constructor? Then you could check to see if that page is loaded.

[abotalov]

What are your thoughts on taking the hash in the constructor? Then you could check to see if that page is loaded.

@natritmeyer Will you accept a PR on that?

[natritmeyer]

I may do in the future but not now. I want to see how this change goes first.