Fix whitespace - remove tabs
Log ldap exception details + catch tls exceptions

Make sure to catch exceptions raised by _setupEncryption
Reindent due to NS_DURING
Log ldap exceptions details
Updated documentation regarding LDAP URLs support
Use string version number where applicable

The goal is to be able to use 'letter' releases such as '2.0.3a'
in the Version file.
SoObjects/Mailer/GNUmakefile.preamble: UIX_MAILER_*_VERSION are now strings
  Can't use SOGoVersion since the etag uses an 'underscore' notation (2_0_3a)
SoObjects/Mailer/*.m: updated format for UIX_MAILER_*_VERSION
SoObjects/SOGo/GNUmakefile: zap SOGo_VERSION, unsused
SoObjects/SOGo/GNUmakefile.preamble: fix defines
UI/MainUI/SOGoRootPage.m: use SOGoVersion
Bump version to 2.0.3a
put back SOGo_VERSION

wasn't unused after all...
Fix partstat of attendee in his calendar

Fixes #2155
deb pkgs recommends 'memcached'. RPMs requires it

Fixes #2016
This means that memcached will always be installed along with sogo.
(Even if it could run on another machine/cluster like database services)