Fixed formatting issues.
Replaced most instances of "element", either with "component" or "program". In some case, "element" is the correct term ("elements of an array") and were left as-is.
Remove app-manager scripts, as they are being replaced with CLI commands
Removes references to app manager scripts, adds Command-line Interface examples, and corrects for numerous changes in the examples.
Removes extra copies of the curl.exe that were being included in the examples.
More updates and fixes.
Adding suggested memory settings for testing.
Merge branch 'release/2.6.0' into feature/r2.6.0_doc_fixes
Added MAVEN_OPTS to build test commands.
Fixed two small typos.
More typos and errors.
Numerous formatting inconsistencies and one grammatical error
Corrected description of where to find an example of the use of the test artifacts in the CDAP SDK
Command-line -> Command Line; left-sidebar -> left sidebar; adding program-type, adding example from pom.xml
Fixed formatting for XML example
Merge pull request #782 from caskdata/feature/r2.6.0_doc_fixes

Release 2.6.0 doc fixes