Revert rst lexer part of last commit.  Apparently the re module of 2.7.3 has a problem while 2.7.11 hasnt.
Revert rst lexer part of last commit.  Apparently the re module of 2.7.3 has a problem while 2.7.11 hasnt.

aswinpj/Pygments,aswinpj/Pygments,aswinpj/Pygments,aswinpj/Pygments,aswinpj/Pygments,aswinpj/Pygments,aswinpj/Pygments,aswinpj/Pygments,aswinpj/Pygments,aswinpj/Pygments,aswinpj/Pygments,aswinpj/Pygments,aswinpj/Pygments,aswinpj/Pygments,aswinpj/Pygments,aswinpj/Pygments,aswinpj/Pygments,aswinpj/Pygments,aswinpj/Pygments