Vala 0.7.10
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 * Support coalescing operator ??.
 * Support to_string and bitwise complement with enums.
 * Return handler id when connecting signal handlers.
 * Support struct comparison.
 * Support constructor chaining in structs.
 * Enforce protected member restrictions.
 * Improve performance of flow analysis.
 * Support automatic line continuations in Genie.
 * Improvements to the .gir reader and writer.
 * Add --enable-mem-profiler commandline option.
 * Many bug fixes and binding updates.