Cosmetic changes and new DNS seed and nodes

Changes on this version:

• Replaced logos.
• Replaced DNS seeds.
• Updated copyright notices.
• Removed twitter feed.
• Added details and links to "about" dialog.
• Added build helpers.
• Refactored build instructions.
• Updated readmes.
• Added changelog.

SHA1 hashes:

• growers-qt-1.2.1-linux-i686.zip: 6842c8ca3561cff10737b166a1c45a65eec25528
• growers-qt-1.2.1-linux-x86_64.zip: 91a8790a592716673810e03a3b6f45a126fe9681
• growers-qt-1.2.1-mac64.zip: aa4655eb1c93b0cffd5f812b91c128f3b0de977e
• growers-qt-1.2.1-win32.zip: 6eecbd6fbbdd7da825e49f505af8220aa3d522da
• growersd-1.2.1-linux-i686-GLIBC2.23.tar.gz: ebea6b072de5b40fc0c59e1503c350fea558979c
• growersd-1.2.1-linux-x86_64-GLIBC2.15.tar.gz: 6ec23ad3e81c27b0420ba19fbeca8ed611934af0
• growersd-1.2.1-linux-x86_64-GLIBC2.23.tar.gz: da16ce0ef7cb7b0679750128b0dcc5855713e3aa
• growersd-1.2.1-mac64.zip: 2a753844c58e3f59b172ad5ab3bc5fbb3a8093bb
• growersd-1.2.1-win32.zip: 29bc9e63be349a5ae6778a46ff10ea00a024ce44

Initial release

v1

Update ticker to GRWI