wxGUI wx.metadata: Fix launch g.gui.metadata, g.gui.cswbrowser (#222)

* wx.metadata/g.gui.metadata: fix wx.FileDialog widget window style

* wx.metadata/g.gui.metadata: fix event handler function binding

* wx.metadata/g.gui.metadata: fix CustomTreeCtrl widget GetSelections method

* wx.metadata/mdlib: fix removeNonAscii function return value

* wx.metadata/mdlib: fix encode string

* wx.metadata/mdlib: fix wx.BoxSizer widget Add method params

* wx.metadata/g.gui.metadata: remove add left wx.Panel widget into wx.BoxSizer widget

* wx.metadata/g.gui.metadata: update wx.SplitterWindow widget size

* wx.metadata/mdlib: increase plus/minus wx.Button widget size (show label)

* wx.metadata/g.gui.metadata, mdlib: fix wx.BoxSizer widget add spacer with Add method

* wx.metadata/mdlib: fix wx.ListCtrl widget wxPyDeprecationWarning

* wx.metadata/mdlib: fix wx.ListCtrl widget set tooltip

* wx.metadata/mdlib: fix decode string

* wx.metadata/mdlib: fix add web service layer

* wx.metadata/mdlib: fix constraints builder dialog layout

* wx.metadata/mdlib: fix constraints builder dialog constraints validation

* wx.metadata/mdlib: fix slice stop index

* wx.metadata/mdlib: remove unused code line

* wx.metadata/mdlib: fix result list wx.ListCtrl widget vertical expand

* wx.metadata/g.gui.metadata: set class config attr (req for the CswPublisher class init)

* wx.metadata/g.gui.metadata, mdlib: replace add space Add method with AddSpacer method (minim. vertical space between widgets)

* wx.metadata/g.gui.metadata: fix not overflow duplicated item widget from ScrolledPanel widget during scrolling

* wx.metadata/mdlib: fix compare two metadata items (remove metadata item)

* wx.metadata/g.gui.metadata.py: remove calling non exist method

* wx.metadata/mdlib: fix pdf doc logo path

* wx.metadata/mdlib: replace google api for generate static map img with osm api (https://github.com/jperelli/osm-static-maps)

* wx.metadata/mdlib: fix write output pdf doc

* wx.metadata/g.gui.metadata.py: fix wx.TreeCtrl widget wxPyDeprecationWarning

* wx.metadata/mdlib: set static map img service url geojson query param with arg (rectangle polygon)

* wx.metadata/mdlib: fix script file header, import py modules according flake8

* wx.metadata/mdlib: set static map img url debug info

* wx.metadata/db.csw.admin: fix missing manual html file error during compilation

* wx.metadata/mdlib: fix transform static map bounds coords to the wgs84

* wx.metadata/db.csw.admin, g.gui.cswbrowser, g.gui.metadata, t.info.iso, v.info.iso: fix import mdlib

* wx.metadata/mdlib: fix missing wxgui path

* wx.metadata/mdlib: fix static map zoom max value

* wx.metadata: improve code of checking add-on py libs dependencies

* wx.metadata/g.gui.cswbrowser, g.gui.metadata: add basic module description

* wx.metadata/mdlib: fix module name

* wx.metadata/mdlib: fix map name

* wx.metadata/mdlib, t.info.iso, v.info.iso: fix flake8-strict errors

* wx.metadata/g.gui.cswbrowser, mdlib: set busy cursor after click on the search btn widget

* wx.metadata/mdlib: fix wx.ListCtrl widget wxPyDeprecationWarning

* wx.metadata/g.gui.cswbrowser, mdlib: fix insert 'unknown' type, wx.ListCtrl widget result item

* wx.metadata/r.info.iso: fix flake8-strict errors

* wx.metadata/t.info.iso: fix write result to output file name destination