[z2048] Fix a bad override, blame VC for this

Signed-off-by: Schmoozerd <schmoozerd@scriptdev2.com>

(based on commit d9c164a)

Signed-off-by: Nighoo <nighoo@overninethousand.de>

(based on commit [s1661] - 376725c)
[z2049] Make use of C++11's static_assert if possible.

Signed-off-by: Schmoozerd <schmoozerd@scriptdev2.com>

(based on commit 45afa02)

Signed-off-by: Nighoo <nighoo@overninethousand.de>

(based on commit [s1662] - a1abd8e)
[z2050] Implement some spells for AQ40

Dark Glare beam spells: 26137, 26009, 26136 and 26029

(based on commit 5c4defa)
(based on commit c4830b8)

(cleaned version of aa2bf20)

(based on commit [s1663] - c0e77ce)
[z2051] Apply CREATURE_FLAG_EXTRA_NO_TALKTO_CREDIT to all creatures

The flag was introduced in [s1442]. It is assumed that by now all quests that require some talk-to credit are handled by different means.
If you catch quests that don't work yet, remove this flag for this npc and report to your DB provider.

(based on commit 629803e)

(based on commit [s1665] - 53fa0af)
[z2052] Prevent unloading go before all players left capture point zone

This fixes m_UniqueUsers not being cleared for example if grid is set to idle and would therefore think that some players are still in range on grid reactivation causing the slider not to appear

(based on commit 444f3c7)

Signed-off-by: Nighoo <nighoo@overninethousand.de>

(based on commit [s1666] - ffb9477)
[z2053] Fix another engrish line and improve the lines output

(based on commit c3f23e4)
(based on commit 2ebed70)

(cleaned version of 4d3b322)

(based on commit [s1637] - fb51728)
Merge branch 'master' into testing