Module creation

1. pjsua2 wapper code moved to pjsua2 module
2. sip module created
    a- it has a child module sip-contracts, it currently contains wrapper objects over the pjsua2 API objects
    b- dependent on pjsua2 module
    c- other wrapper code over pjsua2 APIs will be added here, To be done
Module creation

1. Code added to core sip module
2. Logging module created
3. utils module created, currently added executors to this module itself, to be added as a separate module of its own
4. Commented some uses of SIPSDK and Context module in "sip" module
complete todo of removing dependence on application
reduces the dependency of application context in sip
removes dependency on app from sip module
resolves conflict due to new modules/packages
resolves conflict
introduces more modules and more flatter structure
removes account module's dependency on app module
resolves conflict
completes account store todo: provides persistence
a) Fixes SVN configurations b) removes redundant files
adds few files which were missed to be added
Merge branch 'f_module_todos' of github.com:ssumit/voip_sample into f_module_todos
removes a redundant folder
removes unnecssary logs
Merge branch 'f_module_todos' of github.com:ssumit/voip_sample into f_module_todos
removes a redundant folder
Merge branch 'f_module_todos' of github.com:ssumit/voip_sample into f_module_todos
Merge pull request #2 from talk-to/f_module_todos

 module todos