Add partition shrink blog entry

Squashed commit of the following:

commit c6c8acfb846e1491139491c72ea8583c8f000061
Author: Mark Schabacker <mark.schabacker@gmail.com>
Date:   Sat Aug 23 13:03:34 2014 -0400

    changes from review

commit 7f9cbdce03556bb4d6457f624cadd40b84de166b
Author: Mark Schabacker <mark.schabacker@gmail.com>
Date:   Sat Aug 23 12:50:12 2014 -0400

    punctuation

commit 98d39e442c016161117956aad83166b2bd5924c0
Author: Mark Schabacker <mark.schabacker@gmail.com>
Date:   Sat Aug 23 12:44:47 2014 -0400

    tweak intro

commit 06a283db2638b109b9c70d8de674b7ce5eae1194
Author: Mark Schabacker <mark.schabacker@gmail.com>
Date:   Fri Aug 22 22:11:40 2014 -0400

    Add references

commit 311e4d2b2cc1304c1ae2dbcc952ca2c22443ffb7
Author: Mark Schabacker <mark.schabacker@gmail.com>
Date:   Fri Aug 22 22:05:55 2014 -0400

    Initial draft of shrink post