Add descriptive variables to New-Fixture test template #57

Added a couple features as well.  Feel free to discuss.

###### Add CmdletBinding to new function
- I use "Write-Verbose" frequently, so having [CmdletBinding()] in the new function saves keystrokes.
```powershell
# Output:
function Test {
    
    [CmdletBinding()]
    Param()
}
```
###### Swap New-Fixture params to simplify
- This lets you run New-Fixture by just passing the name param as an arg instead of having to specify "-Name"
```powershell
# Command:
New-Fixture Test

# Generates:
Mode                LastWriteTime     Length Name
----                -------------     ------ ----
-a---         3/13/2014   7:08 AM         66 Test.ps1
-a---         3/13/2014   7:08 AM        340 Test.Tests.ps1
```