Fix coding convention R.RN7 (Avoid the raw C types 'long', 'unsigned long', 'long double', 'bool', 'long long' and 'unsigned long long'.)


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Building ruby against ruby 1.9 (Fedora 17) fails. Firstly, the installation
paths to the headers have changed, so the configure script needs to be changed.
Secondly, some previously deprecated stuff has been removed, so some lines of
code needs to be adjusted.
The attached patch addresses the issues. It still compiles with ruby 1.8 on
RHEL5 with the patch applied.


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Switch off the Reflex support: it was never finalized and now won't be.  White space change in PyROOT.h to force the recompilation now that a CPP macro being passed on the command line is gone (i.e. in this case the .o are 'depending' on the Module.mk)


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thread local, i.e. all modifications direct or indirect of gDirectory will not be 
seen by the other thread.   In particular this means that several I/O operations 
(including TDirectory::Write) are now thread safe (<b>as long as all the required 
TClass and TStreamerInfo has been previously setup</b>).

This model does <b>not</b> support sharing TFile amongst threads (i.e. a TFile 
must be accessed from exactly <b>one</b> thread).   This means that whenever a TFile's 
control is <i>passed</i> from a thread to another, the code must explicitly reset 
gDirectory to another value or there is a risk for this gDirectory to point to a 
stale pointer if the other thread deletes the TFile object.  A TFile deletion will 
only affect the value of the local gDirectory.

Note: gFile now always returns the file of the current directory or zero if the 
current directory is not a TDirectoryFile.   In particular this means that gFile 
itself is now read-only and can not be modified directly.

The global values gDirectory and gFile are now all accessed via a static function 
of their respective class.  The access is made transparent via a CPP macro.

gPad, gVirtualX and gInterpreter are now accessible even when their value 
is zero and they now properly support tab completion. (and the same technique is used 
for gDirectory and gPad).


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Fix error message at line 913 (Coverity: null deref)


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Introduce alternative cmake based build system. Cmake is especially convenient
for building on Windows, as it can produce VC projects or nmake files and 
does not require cygwin to be installed. In addition on OSX Xcode projects
can be generated.


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Fix "unresolved external symbol _G__null" on Windows.


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