Add invitation event data to organization event.

[iphydf]

Also, add support for page_build event.

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This change is 

[robinlinden]

Reviewed 17 of 17 files at r1.
Review status: all files reviewed at latest revision, 5 unresolved discussions.

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web/GitHub/Types/Base/Invitation.hs, line 23 at r1 (raw file):

instance FromJSON Invitation where
    parseJSON (Object x) = Invitation
        <$> x .: "email"

.:->.:? since it's not a mandatory field?

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web/GitHub/Types/Base/PageBuildError.hs, line 20 at r1 (raw file):

instance FromJSON PageBuildError where
    parseJSON (Object x) = PageBuildError
        <$> x .: "message"

.:->.:??

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web/GitHub/Types/Base/PushCommit.hs, line 34 at r1 (raw file):

        <$> x .: "added"
        <*> x .: "author"
        <*> x .: "committer"

.:->.:??

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web/GitHub/Types/Base/StatusCommit.hs, line 35 at r1 (raw file):

        <*> x .: "comments_url"
        <*> x .: "commit"
        <*> x .: "committer"

.:->.:??

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web/GitHub/Types/Events/StatusEvent.hs, line 51 at r1 (raw file):

        <*> x .: "sha"
        <*> x .: "state"
        <*> x .: "target_url"

.:->.:??

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Comments from Reviewable

[robinlinden]

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Review status: all files reviewed at latest revision, all discussions resolved.

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Comments from Reviewable