Extend python scripting functionality in Mantidplot

[Martyn Gigg]

Add interaction with qti objects(graphs etc) from within python script

[Martyn Gigg]

(In [1597]) Extended control of qti objects from within Python window, Re #289

[Martyn Gigg]

(In [1598]) Slightly altered new python/mantidplot interaction to behave more like usual qtiplot behaviour, Re #289

[Martyn Gigg]

(In [1599]) Added updated mantidplotrc and qtiplotrc files to installer directory, Re #289

[Martyn Gigg]

(In [1607]) Changed file open dialog of python scripting window to search for py files by default instead of txt files, Re #289

[Martyn Gigg]

(In [1660]) Added single time bin plotting to python scripting and removed a few warnings from Linux compilation. Re #289

[Martyn Gigg]

(In [1675]) Altered formatting of error messages for Python scriptsso that they are more readable. Re #289

[Martyn Gigg]

(In [1676]) Changed the way in which scripts are run. Now the whole script is executed by default, when pressing the execute key sequence. Re #289

[Martyn Gigg]

(In [1677]) Minor change so that a script is not evaluated if there is nothing there Re #289

[Stuart Campbell]

This ticket has been transferred to github issue ​1137