Revert "#26 improved doc style, used geoserver training theme"

This reverts commit 2f7e3608657f807c5bf7d3bc1b82bc57c2f6acbd.
#114 splitted the page in 2 sections and add an index
Revert "#114 splitted the page in 2 sections and add an index"

This reverts commit a2199825616081c3b8e23e4f8f55a5beb3d2873b.
Revert "#114 first commit of developerAction"

This reverts commit 6dcfdf0973458d794feaf7741d1238aa48bcc626.
fix to a test, fixed return in some utility methods of ImageMosaicAction.java