replaced hardwired copyright year with date range

refs RM ticket 3230
Merge pull request #87 from ilios/rb2.2

replaced hardwired copyright year with date range
cleaned the script's header-comments.
Merge pull request #88 from ilios/rb2.2

cleaned the script's header-comments.
added post-install instructions

refs RM ticket 3160
linked to troubleshooting wiki entry
Merge pull request #89 from ilios/rb2.2

added post-install instructions
updated version number
added IDE settings to gitignore list.
Merge pull request #90 from ucsflibtopfstedt/master

made additions to .gitignore
deleted old dhtmlx scheduler libs/stylesheets/assets. refs #2744
added dhtmlx scheduler v3.7. refs #2744
removed docs, samples and connectors. refs #2744
removed @import statement for deleted dhtmlx scheduler stylesheet.
linked in new dhtmlxscheduler stylesheets and updated image urls.
rewired paths to dhtmlx js files.
replaced calendar agenda view with weekly agenda
removed agenda view configuration.
cleaned up scheduler configuration. removed obsolete rendering hack function.
colorized offerings by session type in week agenda.