IDA Pro 6.6 support

What's new:
- added the decompiler bindings
- Expose simpleline_t type to IDAPython. That lets the user to set the bgcolor & text for each line in the decompilation.
- Wrapped new functions from the IDA SDK

Various fixes:
for non-code locations, idc.GetOpnd() would create instructions instead of returning empty result
- idb_event::area_cmt_changed was never received in IDB_Hooks (and descendants)
- idb_event::ti_changed, and idb_event::op_ti_changed notifications were not accessible in IDAPython
- op_t.value was truncated to 32 bits under IDA64.
- print_tinfo() wouldn't return a valid string.
- readsel2() was not usable.
- read_selection() was buggy for 64-bit programs.
- StructMembers() considered holes in structures, and didn't properly iterate through the whole structure definition.
- There was no way to call calc_switch_cases() from IDAPython.
- when using multi-select/multi-edit choosers, erroneous event codes could be sent at beginning & end of batch deletion of lines.
- When, in a PluginForm#OnCreate, the layout of IDA was requested to change (for example by starting a debugging session), that PluginForm could be deleted and create an access violation.
- tinfo_t objects created from IDAPython could cause an assertion failure at exit time.
- Usage of IDAPython's DropdownListControl was broken.

pywraps/py_askusingform.py

@@ -8,7 +8,7 @@ try:
     from _idaapi import set_script_timeout
     import idaapi
     from idaapi import py_clinked_object_t
-    from idaapi import qstrvec_t
+    from idaapi import _qstrvec_t
     stdalone = False
 except:
     stdalone = True
@@ -50,7 +50,7 @@ try:
         from py_choose2 import *
         py_clinked_object_t = idaapi.py_clinked_object_t
         textctrl_info_t     = idaapi.textctrl_info_t
-        qstrvec_t           = idaapi.qstrvec_t
+        _qstrvec_t          = idaapi._qstrvec_t
 
     _idaapi.BADADDR = 0xFFFFFFFF
     _idaapi.MAXSTR  = 1024
@@ -776,7 +776,7 @@ class Form(object):
             Form.Control.free(self)
 
 
-    class DropdownListControl(InputControl, qstrvec_t):
+    class DropdownListControl(InputControl, _qstrvec_t):
         """
         Dropdown control
         This control allows manipulating a dropdown control
@@ -803,7 +803,7 @@ class Form(object):
                 hlp)
 
             # Init the associated qstrvec
-            qstrvec_t.__init__(self, items)
+            _qstrvec_t.__init__(self, items)
 
             # Remember if readonly or not
             self.readonly = readonly
@@ -814,7 +814,7 @@ class Form(object):
                 val_addr      = addressof(self.__selval)
             else:
                 # Create an strvec with one qstring
-                self.__selval = qstrvec_t([selval])
+                self.__selval = _qstrvec_t([selval])
                 # Get address of the first element
                 val_addr      = self.__selval.addressof(0)