Merge ticket #20 Lectures Controller の実装

Squashed commit of the following:

commit c108f87ec903e6bf2cc72d613ce64165b66076c6
Author: masato.tanoi <masato.tanoi@gmail.com>
Date:   Sat Mar 22 02:08:53 2014 +0900

    Lecture controller の index を修正

commit f79ee59184af9b509a7eebbde601b946a6ce3d0b
Author: masato.tanoi <masato.tanoi@gmail.com>
Date:   Sat Mar 22 01:12:22 2014 +0900

    Lecture controller 間違えを修正

commit 4e4c7b1ed5a4cc24f7387ac80355e0625c9b1dc7
Author: masato.tanoi <masato.tanoi@gmail.com>
Date:   Sat Mar 22 01:10:25 2014 +0900

    Lecture controller の show の実装

commit 3bd5fc122fddafb700ed607666b0df75fce1d71c
Author: masato.tanoi <masato.tanoi@gmail.com>
Date:   Sat Mar 22 01:08:08 2014 +0900

    Lecture controller の index の実装

commit 1e06d5563eea5f8051093b649a7110c724f98e20
Author: masato.tanoi <masato.tanoi@gmail.com>
Date:   Fri Mar 21 22:33:34 2014 +0900

    Lecture model で Array で格納が必要なカラムに Array を格納できるようにした。
Merge ticket #29 Credit Model の実装

Squashed commit of the following:

commit 7d410b56499d19d4220286595a99a2e24f608ec9
Author: masato.tanoi <masato.tanoi@gmail.com>
Date:   Sat Mar 22 12:55:49 2014 +0900

    Credit Model の作成
Merge ticket #30 Lectures Controller の実装

Squashed commit of the following:

commit 2787cc188d343a4ad677b6dd3b5db341e5a48044
Author: masato.tanoi <masato.tanoi@gmail.com>
Date:   Sat Mar 22 13:24:11 2014 +0900

    api 仕様書に Credit model を追加

commit 48fcc55a29e47e76ba88f2e1614c25934397a942
Author: masato.tanoi <masato.tanoi@gmail.com>
Date:   Sat Mar 22 13:14:07 2014 +0900

    Credit controller を作成

commit 7d410b56499d19d4220286595a99a2e24f608ec9
Author: masato.tanoi <masato.tanoi@gmail.com>
Date:   Sat Mar 22 12:55:49 2014 +0900

    Credit Model の作成