Allow users to ignore certain fields in their structs during binding
JMS #45: Started adding support for CookieStore Options
JMS #45: Tests and Options on Session as well
JMS #45: Godoc Documentation
Merge pull request #64 from codegangsta/JMS-45

Session options for Session and CookieStore
Merge pull request #63 from rday/IgnoredBindingFields

[binding] Allow users to ignore certain fields in their structs
Updated readme to show skipping fields with form binding
Fix import path on README.
Merge pull request #67 from shuhei/master

Fix import path on README.
Added charset encoding
fix memory leak

I detect this leak on my application when perform ab testing. Context assign to request when session call set or get.
Removed the DisableCharset option, left default as it was
defer context.Clear(r)
Merge branch 'charset' of github.com:cojac/martini-contrib into cojac-charset
Returning on HTML rendering error
Making default charset UTF-8.

- This is kind of a breaking change but it is a good one.
- There is now no way to not have a charset for rendering HTML and JSON.
  This is a good thing.
Fix errors in usage example

There are a few errors in the example that may lead people astray.

Another note is that it would be good to have an example of `myOwnErrorHandler` for users.
Merge pull request #69 from DmitryBochkarev/patch-1

fix memory leak
Merge pull request #74 from danawoodman/patch-4

Fix errors in usage example
Updated docs and UTF-8 capitalization.