fixed compile errors

[SVN r66615]
correct namespaces for mpl_graph as child of msm

[SVN r66618]
put mpl_graph inside msm namespace

[SVN r66627]
bugfix (anonymous transition of a submachine was not called for the initial state)

[SVN r67085]
new region calculation algorithms

[SVN r67114]
is_flag_active made const

[SVN r67115]
added checking of unreachable states

[SVN r67138]
applied patch bugfix for trac 4926

[SVN r67253]
fixed possible VC8 problem

[SVN r67255]
added possibility to choose the container for the message and deferred events queues

[SVN r67376]
added get_history. Returns the history object.

[SVN r67381]
fixed gcc warnings

[SVN r67658]
fixed warning

[SVN r67897]
doc for msm 2.20

[SVN r67934]
better implementation of the favor_compile_time policy, not based on boost::any

[SVN r68194]
added link to MPL.Graph doc

[SVN r68213]
fix (exploding compile-time)

[SVN r68403]
Fixed trac 5117

[SVN r68535]
fixed warnings about unused variables

[SVN r68854]
- fixed trac 5253
- fixed warning unused variable

[SVN r70832]