sample-program names differ, depending on context

[DavidLudwig]

io2d's samples have different names, depending on where they are listed. Examples:

1. Rocks In Space is listed as both "RocksInSpace" and "rocks_in_space"
2. DrawCPP is listed as both "DrawCPP" and "draw_cpp"
3. CPULoad is listed as "CPULoad" and "cpuload"

The differences seem to show up predominately in samples' directory-name, and their CMake project name.

Are there any objection(s), or significant reason(s), to keep the names different? I could see io2d's CMakeLists.txt file(s) get simplified, and perhaps the ability to add new samples be heavily-simplified, if the separate names were merged. I'd be happy to try putting together a Pull Request for such, too.

[DavidLudwig]

One possible merging of sample-names could look like this, for example:

• CPULoad + cpuload --> cpu_load
• DrawCPP + draw_cpp --> draw_cpp
• Life + life --> life
• Maps + maps --> maps
• RocksInSpace + rocks_in_space --> rocks_in_space
• Sprites + sprites --> sprites
• SVG + svg --> svg

[DavidLudwig]

Resolved via #91