Minor Improvements: Added collapse-option + perf-improvements + icons

commit b2047a51a7ec4c2a51217e61d46d8400b35c75f1
Author: Sundeep Paruvu <sparuvu@gmail.com>
Date:   Mon Jan 13 10:12:01 2014 -0600

    Added the expand and collapse icons

commit ab8bb7c53ddb847f163d990554536b38d005ffe2
Author: Sundeep Paruvu <sparuvu@gmail.com>
Date:   Sat Jan 11 15:37:37 2014 -0600

    Added some perf. improvements in creating the DOM

commit 6f17f694210f5427b5e3007547c9802bd4b4b4b8
Author: Sundeep Paruvu <sparuvu@gmail.com>
Date:   Sat Jan 11 14:56:15 2014 -0600

    space between the empty objects

commit 32b141ef2420538aed0e224e97d673f45ff3e1f2
Author: Sundeep Paruvu <sparuvu@gmail.com>
Date:   Sat Jan 11 14:54:25 2014 -0600

    Rounded corners for highlighted objects

commit 496bcf6785007abd53468426655f096c3c73819d
Author: Sundeep Paruvu <sparuvu@gmail.com>
Date:   Sat Jan 11 14:51:52 2014 -0600

    Fixed some perf. issues + added collapsibility for parent brace + related css

commit 8f0a1f5ddd40976039bacbdd2e96babe7a44b172
Author: Sundeep Paruvu <sparuvu@gmail.com>
Date:   Fri Jan 10 13:10:43 2014 -0600

    Added the license info to the library files

commit 50582c07d4f74f7d5ae1afdd2154a58a282d34d6
Author: Sundeep Paruvu <sparuvu@gmail.com>
Date:   Fri Jan 10 13:05:08 2014 -0600

    some performance improvement + code refactoring

commit 5a9dcb0fe733732ea4c9d7116b6b72e7d15aaf72
Author: Sundeep Paruvu <sparuvu@gmail.com>
Date:   Thu Jan 9 23:00:23 2014 -0600

    Updated the read me for collapse option

commit 14c9d8a31e76bfb19dd32ea02360e15e158777df
Author: Sundeep Paruvu <sparuvu@gmail.com>
Date:   Thu Jan 9 22:57:06 2014 -0600

    Added the Collapse option

commit 40e762b7d93eb8501dc4571f31a4131c9470f03b
Author: Sundeep Paruvu <sparuvu@gmail.com>
Date:   Thu Jan 9 14:40:26 2014 -0600

    fixed the issues with the highlighting of the hovered object

commit d1ffe8a98f051836c5f15d44b90fdf7e14a0796d
Author: Sundeep Paruvu <sparuvu@gmail.com>
Date:   Thu Jan 9 12:54:47 2014 -0600

    fixed the undefined error on sourceJson