Added @import doMC to areaSieve and roxygenised
doMC added to DESCRIPTION
annualSummary re-written to handle dates more effectively.

A separate dates argument is included to handle non-Landsat data, or data lacking a date dimension or appropriate layer names. Support for a z-dimension including dates is now included.

Also, there was a conflict with the years argument and an internal variable which has now been solved.
Added support for z-dimension

This is implemented in functions where a dates vector is required (either explicitly supplied or derived from the z-dimension or names(x)).

Also, doMC was removed from @import and replaced with foreach, and also replaced in DESCRIPTION to prevent the error in roxygenise().

Package was finally roxygenise()'d after all changes
Merge branch 'feature-getZ' into develop
Function to check if character conforms to Landsat naming convention
Created .hasLandsatSceneID()

Function returns TRUE if all elements of input conform to Landsat sceneID, and FALSE otherwise. Works on raster objects and character vectors.
Simplified the isLandsatSceneID function and extended it to the classes rasterBrick / rasterStack
Renaming of the file went wrong in the previous commit
When more than one hdf files are extraxted from the archive, sds are read from all, and possible errors (mostly due to hdfs containing no more than one sds) are handled
Made greps on vis case insensitive, since VI names are capitalised in the hdf subdatasets
Bumped up the version number of the package to 0.3
Merge branch 'hotfix-hdf'
Cleaned all the vignette junk
Tiny addition to previous bug fix (list simplification was not done properly)
Fixed cropping step when VI need to be calculated from sr
New patch working, bumped the version number to 0.2.2
Merge branch 'hotfix-sr2vi-crop'
Merge branch 'master' into develop
merge with remote branch

Merge branch 'feature-isLandsatSceneID' of http://github.com/dutri001/bfastSpatial into feature-isLandsatSceneID

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