Minor fixes and updated documentation.

New Changes:
* Added TCP keepalive support - enabled by default now
* Changed requirement of boost 0.49 to 0.46 to support Ubuntu 12.04 builds
* Updated deb_package to support install prefix
* Changed database schema to use latin1 consistently to support reduced key sizes
* Changed path_attr_log to support history of all changed updates - this supports better reporting
  like seen with withdrawn_log

Fixes:
* Fixed issue with BMP peer down notification type 2 causing thread close
* Fixed minor issues with the various views - this includes better optimization for v_routes_history
* Corrected CMakeList.txt MPReachAttr to support older versions of cmake, was a typo.
* Fixed various file mode permissions in the source tree
* Corrected some code to support C++0x and OSX builds

Docs:
* Added new binary package for Ubuntu 14.04 to www.openbmp.org
* Updated build docs to reflect the new output seen when building the latest
* Updated Database doc to include more details for the my.cnf config
* Added requirements document to include details about system profiles as well as depends
* Added router config document
* Changed install doc to include a required steps table - highlight what's required
* Changed install doc to include install of binary package