Merge pull request #8 from avalentino/PF-ASAR_v6.02

Support for ASAR SW v6.02
Merge branch 'float_bands'
Add missing link target
Set the soname
Fix table size
Add missing epr_set_log_level implementation
Add missing epr_set_err_handler implementation
Fixed a small installation issue

Only try to install the static library if it has been actually built
Use distinct lib and dev components for a more fine grained control on installation
Fixex a potential build issue with test programs

Some of the test program use internal functions that are not exported
by the shared library.
Now problematc test programs are linked agains the static version of the
library or they are built using the library source files.
Updated the symbol declaration file for win
Specify symbols to be exported in the shared lib using a version-script
Fix exported symbols on mac
Small refinement to symbol list handling on mac
Minor changes
Final refinements to symbol control system

I no better info are available it is assume to use the GNU linker.
Also, a flag to to completely disable symbol control has beeb added
(OFF by default).
epr_set_err_handler and epr_set_log_level symbols have been (actually) introduced in version 2.3
Fix EPR_NUM_PRODUCT_TABLES
Add missing prototype
Additional checks