Fix Freelook on Linux and add speed reset.

Should fix issue 7692.
Also fixes issue 7147.

I have no idea if these changes will affect Mac or Windows users, so please test.
Update freelook description.
Reorganize faulting stuff.  Differentiate between arch- and OS-specific defines.

- Get rid of ArmMemTools.cpp and rename x64MemTools.cpp to MemTools.cpp.
  ArmMemTools was almost identical to the POSIX part of x64MemTools, and
  the two differences, (a) lack of sigaltstack, which I added to the
  latter recently, and (b) use of r10 to determine the fault address
  instead of info->si_addr (meaning it only works for specifically
  formatted JIT code), I don't think are necessary.  (Plus Android, see
  below.)

- Rename Core/PowerPC/JitCommon/JitBackpatch.h to Core/MachineContext.h.
  It doesn't contain anything JIT-specific anymore, and e.g. locking
  will want to use faulting support regardless of whether any JIT is in
  use.

- Get rid of different definitions of SContext for different
  architectures under __linux__, since this is POSIX.  The exception is
  of course Android being shitty; I moved the workaround definition from
  ArmMemTools.cpp to here.

- Get rid of #ifdefs around EMM::InstallExceptionHandler and just
  provide an empty implementation for unsupported systems (i.e.
  _M_GENERIC really).  Added const bool g_exception_handlers_supported
  for future use; currently exception handlers are only used by the JIT,
  whose use implies non-M_GENERIC, but locking will change that.

- Remove an unnecessary typedef.
Updated game ini files
ISOFile: Get rid of a delete call
WatchView: Pass string by reference in SetWatchName
Reimplements fastmem for ARMv7 floating point loadstores.

This implements a new system for fastmem backpatching on ARMv7 that is less of a mindfsck to deal with.
This also implements stfs under the default loadstore path as well, not sure why it was by itself in the first place.

I'll be moving the rest of the loadstore methods over to this new way in a few days.
Merge pull request #1551 from Sonicadvance1/armv7-float-fastmem

Reimplements fastmem for ARMv7 floating point loadstores.
Merge pull request #1555 from lioncash/ref

WatchView: Pass string by reference in SetWatchName
Core: Join some variable declarations and assignments
Merge pull request #1554 from lioncash/unique

ISOFile: Get rid of a delete call
Merge pull request #1557 from lioncash/join

Core: Join some variable declarations and assignments
Explicitly compile external WX in C++11 mode.

Apparently an update to gcc now requires this.
Fix wxCommandEvent/wxThreadEvent subclass mismatch

Regression by 3fed975bac11956ffc4d3eae86c928c7e0c921db caused netplay to
crash on OS X.  While I'm at it, fix the long-standing "unsafe i guess"
AddPendingEvent, since we depend on wx 3 now...
Merge pull request #1558 from comex/command-thread-mismatch

Fix wxCommandEvent/wxThreadEvent subclass mismatch
Changed the hotkeys to 1 and 2. Message in GUI changed to reflect this.
Merge pull request #1449 from comex/memtools-merge

Reorganize faulting stuff.  Differentiate between arch- and OS-specific defines.
Merge pull request #1306 from i418c/freelook_fixes

Freelook fixes
Android: Use a PagerTabStrip instead of the ActionBar.

The ActionBar method of doing the tabular layout is deprecated on Android 5.0.
This method alleviates those deprecations while providing the same functionality.
Make freelook hotkeys configurable.