Replacing incorrect password in replace_profiles script

Added labs to the profile replacement script

tentative script for replacing profiles on the fly

Merge pull request Esri#464 from Esri/dev_site_next_release

Dev site next release (V1.6.2)

Merge branch 'master' of https://github.com/Esri/arcgis-python-api

Merge pull request Esri#365 from DavidJVitale/insecure_url_nb

Added Insecure Notebook Sample

Adding v1.5.3 API doc so we can tag v1.5.3 samples and guides

Merge pull request Esri#332 from jyaistMap/v152-release-notes

Release notes for the upcoming v1.5.2. release

Merge pull request Esri#326 from DavidJVitale/master

Added 1.5.1 API doc to public repo for tagged release

Merge pull request Esri#298 from Esri/dev_site_current

Updated SDK for 8/30 website update