Add of scheduling constraints on simulators

* Added checked constraint that verify that the time between two executions
  of the same simulator is equal to delta T
* Added forced constraint that force the time between two executions
  of the same simulator to be equal to delta T
* Updated openfluid command line display of delta t information
* Refactored fluidx format
* Updated tests

(references #184)
Management of scheduling constraints on simulators in Builder GUI

* Updated layout of run configuration form
* Updated run configuration management
* Renamed methods

(closes OpenFLUID/openfluid#184)
Removal of deprecated files buffer setting
Removal of deprecated simulation ID information
Refactoring of values buffer management

* Updated method for automatic buffers size, 
  now size cannot be less than 2
* Modified tag in fluidx file for fixed size
* Updated tests
* Updated newdata buddy
Fix of text mispells in Builder
Update of CMake helper macro for building simulators

* Added building of simulators doc
* Added built simulators tests
* Added built simulators installation
Update of URLs of web links

* Updated main URL
* Updated other URLs
* Cleaned duplicate URL management in config files

(closes OpenFLUID/openfluid#139)
Update of software information

* Updated AUTHORS file
* Updated Copyright information dates
* Switched to version 2.0.0~alpha5
Redesign of macros for declarations in wares signatures 

* Removed redundant _SIGNATURE_ word in DECLARE_XXX macros
* Cleaned code
* Updated tests
Add of a primitive to get the scheduling constraint currently applied
Fix of scheduling macros for simulators signatures
Update of tests and doc

* Updated doc of ware methods
* Updated file format for input data tests
* Updated tests of input data primitives
Add of GNUplot observer for export simulation variables to graphs

* Added export.vars.plot.gnuplot
* Updated tests

(closes OpenFLUID/openfluid#56)
Switch to version 2.0.0~beta1
Clean and update of observers and examples simulators

* Updated version in signatures
* Updated description in signature of GNUplot observer
* Removed obsolete files
Fix of wrong dependency to Boost Regex library
Update the Manhattan example

* Cleaned Codes
* Updated fluidx files
Clean of the Manhattan example
* Reverted version to framework version
* Fixed misspelling in test
Improvement of Manhattan examples:
* Added inputdata checkConsistency for TLU simulator
* Added global parameter for RU simulator