In a number of places, the viewer uses a lookup based on std::type_info*. We
used to use std::map<std::type_info*, whatever>. But on Linux,
&typeid(SomeType) can produce different pointer values, depending on the
dynamic load module in which the code is executed. Introduce
LLTypeInfoLookup<T>, with an API that deliberately mimics
std::map<std::type_info*, T>. LLTypeInfoLookup::find() first tries an
efficient search for the specified std::type_info*. But if that fails, it
scans the underlying container for a match on the std::type_info::name()
string. If found, it caches the new std::type_info* to optimize subsequent
lookups with the same pointer.
Use LLTypeInfoLookup instead of std::map<std::type_info*, ...> in
llinitparam.h and llregistry.h.
Introduce LLSortedVector<KEY, VALUE>, a std::vector<std::pair<KEY, VALUE>>
maintained in sorted order with binary-search lookup. It presents a subset of
the std::map<KEY, VALUE> API.

moved LLInitParam, and LLRegistry to llcommon
moved LLUIColor, LLTrans, and LLXUIParser to llui
reviewed by Nat

STORM-653 As a user i would like to be able to see the available number of attachments and remaining free slots.

EXP-1742 FIX -- Clicking IM notification or receiving multiple IM notifications in quick succession crashes to desktop

* Moved toast logic for mouse hover out of the draw call to avoid chain of callbacks that lead to reordering of the draw list while we are iterating over it.

The error sometimes led to the following issues with maximized viewer window on MS Windows:
* displaying incorrect resolution
* failure to update snapshot

storm-1729: ensure that cpu id has no leading or trailing spaces for ease of comparison and formatting

STORM-1731 Changes per RB comments: changed llwarns to llinfos, added check so you cannot mute a Linden