Rename 's_diffmap' to 's_diff_map'

Keep naming consistency.

https://bugzilla.gnome.org/show_bug.cgi?id=720726
Don't open WebKit inspector at the start

As we are using WebView in both history and commit activties, it is
annoying to see two WebKit inspector windows open when Gitg starts.

https://bugzilla.gnome.org/show_bug.cgi?id=720726
Document why we call 'update_diff()' here

https://bugzilla.gnome.org/show_bug.cgi?id=720726
Remove an accident dot

https://bugzilla.gnome.org/show_bug.cgi?id=720736
Improve the code format

https://bugzilla.gnome.org/show_bug.cgi?id=720736
Merge branch 'master' into develop
Rename 's_diffmap' to 's_diff_map'

Keep naming consistency.

https://bugzilla.gnome.org/show_bug.cgi?id=720726
Don't open WebKit inspector at the start

As we are using WebView in both history and commit activties, it is
annoying to see two WebKit inspector windows open when Gitg starts.

https://bugzilla.gnome.org/show_bug.cgi?id=720726
Document why we call 'update_diff()' here

https://bugzilla.gnome.org/show_bug.cgi?id=720726
Remove an accident dot

https://bugzilla.gnome.org/show_bug.cgi?id=720736
Improve the code format

https://bugzilla.gnome.org/show_bug.cgi?id=720736
Merge branch 'landed-commits' into develop
Remove obsolete code

As well as some format and comment improvements.
Rename to 'table_body'

https://bugzilla.gnome.org/show_bug.cgi?id=720886
Use jQuery like the rest

https://bugzilla.gnome.org/show_bug.cgi?id=720886
Close '<tr>' tag properly

https://bugzilla.gnome.org/show_bug.cgi?id=720886
Use '<span>' instead '<div>'

https://bugzilla.gnome.org/show_bug.cgi?id=720886
Rename 'filepath' to 'file_path'

https://bugzilla.gnome.org/show_bug.cgi?id=720886
Rename 'table_body' to 'file_body'

https://bugzilla.gnome.org/show_bug.cgi?id=720886
Rename 'stats' to 'file_stats'

https://bugzilla.gnome.org/show_bug.cgi?id=720886