* better CMakeLists
* update summary
* fix -std= option for gcc
* freebsd build fixes
+ BUILD_NOTES.md
* use hardening linker flags only with gcc
use Tag<32> for SSU key
Merge pull request #98 from hagen-i2p/better-cmakelists

Better cmakelists
avoid double delete
acquire DH pair by demand only
read Identity from SessionConfirmed message
adjust MTU for incoming SSU sessions
+ debian/
* fix CFLAGS in Makefile.linux
* Makefile : move common targets to top-level Makefile
- remote hardcoded rpath from Makefile
Update version.h

fixed typo
read extended indentities from hosts.txt
fixed crash
aquire DH keys if demanded  only